# World Renderer

## Metadata

| Field | Value |
|---|---|
| Status | Partial |
| Target/work package | M00 baseline; `M01-RND-STREAMING-FOCUS-001`; `M01-QAR-SERVER-SPAWN-RENDERER-001`; M03 facade/planner/scheduler/internal-access/ground/environment/entity packages; M03 terrain packages; M03 M2 packages; M03 WMO placement package |
| Owners | Renderer workstream / milestone integrator |
| Last verified | Worktree `work/sindo-main-codex/m03-m2-animation-playback`, 2026-07-18 |
| Profiles/capabilities | `Performance`, `Balanced`, `High`, `Custom`; Blizzlike fidelity incomplete |

## Purpose

Загрузить и визуализировать мир WoW 3.3.5a вокруг streaming focus: terrain, ADT placements, M2, WMO, liquids, sky/light и character/world presentation experiments. Система должна скрывать I/O/parsing/finalization latency за prewarm и per-frame budgets.

## Non-goals

- Не владеет gameplay/world authoritative state.
- Не читает network packets или server DB.
- Не определяет player input/movement rules.
- Не является Content Project или editor source of truth.
- Текущий module не заявляет визуальное соответствие `1:1`; gaps ведутся в [`../../RENDER.md`](../../RENDER.md).

## Context and boundaries

```mermaid
flowchart LR
    Player[Player or spectator Node3D] --> Adapter[Explicit source adapter]
    Editor[Editor viewport adapter] --> Focus[StreamingFocus]
    Capture[Capture tool] --> Adapter
    SpawnFixture[Pinned server spawn fixture] --> SpawnManifest[Spawn render manifest]
    SpawnManifest --> Capture
    Adapter --> Focus
    Focus --> Facade[WorldRenderFacade]
    Facade --> Loader[StreamingWorldLoader internal]
    Loader --> Planner[StreamingTargetPlanner]
    Planner --> TargetPlan[StreamingTargetPlan]
    TargetPlan --> Loader
    Loader --> Budget[RenderBudgetScheduler]
    Assets[Extracted WDT/ADT/M2/WMO/BLP] --> Native[Native loaders]
    Cache[Baked terrain/M2/WMO caches] --> Loader
    Loader --> TerrainCache[TerrainQualityMeshCache]
    TerrainCache --> Loader
    Loader --> ChunkLod[TerrainChunkLodPlanner]
    ChunkLod --> Loader
    Loader --> ChunkQueue[TerrainChunkGeometryQueuePlanner]
    ChunkQueue --> Loader
    Loader --> M2Registry[M2UniquePlacementRegistry]
    M2Registry --> Loader
    Loader --> M2Grouper[M2PlacementGrouper]
    M2Grouper --> M2Transform[M2PlacementTransformResolver]
    M2Transform --> M2Grouper
    M2Transform --> Loader
    Loader --> M2Batch[M2BuildBatchPlanner]
    M2Batch --> Loader
    Loader --> M2Dispatch[M2BuildDispatchPlanner]
    M2Dispatch --> Loader
    Loader --> M2Resources[M2BuildResourceSnapshot]
    M2Resources --> M2Dispatch
    Loader --> M2Queue[M2BuildQueue]
    M2Queue --> Loader
    Loader --> M2Static[M2StaticBatchMaterializer]
    M2Static --> Scene
    Loader --> WmoPlacement[WmoPlacementResolver]
    WmoPlacement --> Loader
    Loader --> WmoRegistry[WmoPlacementRegistry]
    WmoRegistry --> Loader
    Loader --> WmoBuildStep[WmoRenderBuildStepPlanner]
    WmoBuildStep --> Loader
    Loader --> WmoBuildQueue[WmoRenderBuildQueue]
    WmoBuildQueue --> Loader
    Native --> Parsed[Parsed tile/model data]
    Parsed --> Loader
    Loader --> Scene[SceneTree nodes]
    Loader --> RS[RenderingServer RIDs/MultiMesh]
    EnvironmentState[World time producer] --> EnvironmentSnapshot[WorldEnvironmentSnapshot]
    EnvironmentSnapshot --> Facade
    Facade --> SkyController[WowSkyController]
    Sky[DBC sky/light data] --> SkyController
    SkyController --> Scene
    EntityState[Entity visual read model] --> EntitySnapshot[EntityPresentationSnapshot]
    EntitySnapshot --> Facade
    Facade --> EntityPresenter[WorldEntityPresenter]
    EntityPresenter --> Scene
```

Allowed dependencies:

- native format loaders;
- render builders/material helpers;
- immutable/cached render resources;
- renderer configuration and focus;
- Godot rendering/scene APIs.

Forbidden dependencies:

- packet codecs/world session;
- gameplay reducers/quest/combat state;
- runtime UI Controls;
- direct TrinityCore/AzerothCore database access.

## Public API

Runtime, capture and probe callers use `WorldRenderFacade` for focus, immutable
environment/entity presentation input, metrics and rendered-ground diagnostics.
`StreamingWorldLoader`, `WowSkyController` and `WorldEntityPresenter` remain
internal scene implementations.
Gameplay modules and Godot `EditorPlugin` package sources are repository-gated
from externally reading/writing loader-private queue, task, cache and tile-state fields.

| Symbol | Kind | Purpose | Thread/lifetime | Errors |
|---|---|---|---|---|
| `map_name` | Exported property | WDT/map directory name | Set before world load | Missing WDT produces diagnostic/empty world |
| `extracted_dir` | Exported property | Root of legally extracted client data | Session lifetime | Missing files reported per loader path |
| `StreamingFocus` | Immutable value | Typed Godot-basis position without Node/Camera dependency | Any thread; caller-owned reference | Null position is a caller contract violation |
| `WorldRenderFacade.streaming_focus_source_path` | Exported adapter property | Samples any explicit `Node3D` source into `StreamingFocus` | Main thread, scene lifetime | Missing/wrong node warns once and retains prior focus |
| `WorldRenderFacade.set_streaming_focus` | Public method | Accepts focus from app/editor/tool composition | Main thread/session | Missing internal renderer is diagnosed; no state is duplicated |
| `WorldRenderFacade.refresh_streaming_focus` | Public method | Samples configured source and delegates existing refresh thresholds | Main thread/session | Returns `false` when dependency/focus is unavailable |
| `WorldRenderFacade.renderer_metrics_snapshot` | Public method | Returns a deep-detached queue/cache/activity snapshot | Main thread/caller-owned result | Missing/invalid implementation result returns empty snapshot with diagnostic |
| `WorldRenderFacade.sample_ground_height` | Public read-only query | Samples already loaded render terrain at a typed Godot world position | Main thread; immutable caller-held result | Stable unavailable code for missing mesh/intersection/facade; not gameplay authority |
| `WorldRenderFacade.renderer_ground_query_snapshot` | Public diagnostic query | Returns ground height plus detached tile/readiness context without exposing mutable state | Main thread; caller-owned deep copy | Missing/invalid renderer returns empty snapshot with diagnostic |
| `WorldEnvironmentSnapshot.at_time_of_day` | Immutable value factory | Normalizes a finite authoritative time into `[0, 24)` hours | Any thread; caller-held value | Non-finite input creates invalid value with `environment_time_not_finite` |
| `WorldRenderFacade.apply_environment_snapshot` | Public command | Delegates exact world time to the scene-owned DBC sky controller | Main thread; snapshot remains caller-owned | Returns `false` for invalid input or missing/incompatible controller |
| `WorldRenderFacade.streaming_world_loader_path` | Internal adapter property | Resolves the existing implementation without exposing it to consumers | Main thread, scene lifetime | Missing method/path produces one diagnostic until recovery |
| `WorldRenderFacade.world_environment_controller_path` | Internal adapter property | Resolves the existing `WowSkyController` without exposing it to consumers | Main thread, scene lifetime | Missing method/path produces one diagnostic until recovery |
| `EntityPresentationSnapshot.create` | Immutable value factory | Validates contract-v1 identity, typed position, visual path, yaw, scale and visibility | Any thread; caller-owned | Stable invalid code; never mutates scene |
| `WorldRenderFacade.present_entity` | Public command | Idempotently creates/updates/replaces one session entity visual | Main thread/session | Returns false for invalid input, missing service or visual load/type failure |
| `WorldRenderFacade.remove_entity` | Public command | Removes one known session entity visual | Main thread/session | Invalid/unknown identity returns false |
| `WorldRenderFacade.entity_presentation_snapshot` | Public diagnostic query | Returns detached scalar entity inventory | Main thread/caller-owned copy | Missing/invalid service returns empty dictionary with diagnostic |
| `WorldRenderFacade.world_entity_presenter_path` | Internal adapter property | Resolves renderer-owned entity visual service | Main thread/scene lifetime | Missing methods/path produces one diagnostic until recovery |
| `camera_path` | Exported property | Camera used only by optional automatic overview positioning | Main thread, scene lifetime | Missing camera skips automatic positioning |
| `quality_preset` | Exported property | Applies renderer budgets/radii | Before/at runtime depending property | Invalid combination should be diagnosed |
| `runtime_stats_enabled` | Exported property | Enables periodic performance snapshot | Runtime mutable | Logging overhead only |
| `hitch_profiler_enabled` | Exported property | Enables named hitch sections | Runtime mutable | Logging overhead only |
| `TerrainQualityMeshCache.store/restore/clear` | Internal terrain service | Owns admitted full-quality revisit Mesh references and LRU | Renderer thread/map session | Rejected/missed entry leaves loader fallback unchanged |
| `TerrainChunkLodPlanner.plan` | Internal pure terrain query | Maps populated parsed chunk indices to desired LOD 0/1/2 | Synchronous per target refresh | Invalid/disabled input returns empty for existing tile-LOD fallback |
| `TerrainChunkGeometryQueuePlanner.plan` | Internal pure terrain query | Produces chunk create/remove requests from current and desired state | Synchronous per queue rebuild | Invalid focus returns empty arrays |
| `M2UniquePlacementRegistry.reserve/release/clear` | Internal M2 service | Owns positive cross-tile ADT placement-ID reservations | Renderer thread/map session | Invalid/unkeyed/non-owner inputs preserve documented fallback |
| `M2PlacementTransformResolver.resolve_basis/resolve_origin_offset` | Internal pure M2 service | Resolves regular and calibrated model-specific ADT placement transforms | Worker/main thread; stateless | Unknown paths use regular basis and zero offset |
| `M2PlacementGrouper.group_placements` | Internal pure M2 service | Validates and groups ordered tile-local placement transforms by normalized path | Worker/main thread; stateless | Invalid variants/name IDs/empty paths are skipped |
| `M2BuildBatchPlanner.plan_batch` | Internal pure M2 service | Selects static/animated batch count and next group cursor | Main/any thread; stateless | Non-positive selected limit clamps to one; empty range completes |
| `M2BuildDispatchPlanner.plan_step` | Internal pure M2 service | Selects wait, animated/static materialization or no-Node advancement from observed resource state | Main/any thread; stateless | Pending animation has priority; unresolved static Mesh waits |
| `M2BuildResourceSnapshot` | Internal M2 value contract | Carries per-step normalized path, animated/static references and pending/missing observations | Renderer main thread; one build operation | Values retained exactly; release never frees resources |
| `M2StaticBuildResourceObserver.observe` | Internal M2 I/O service | Produces cached/pending/requested/missing static snapshot phase | Renderer main thread; stateless | Invalid composition rejected; no candidate marks missing |
| `M2CachedAnimationResourceObserver.observe` | Internal M2 I/O service | Produces cached/pending/static-only animated snapshot phase | Renderer main thread; stateless | Invalid composition returns empty snapshot; no safe candidate marks static-only |
| `M2BuildQueue` / `M2BuildJob` | Internal M2 pending-state service | Own typed root/groups/cursor jobs and FIFO/stale tile keys | Renderer main thread; map session | Invalid enqueue rejected; stale keys drain independently of jobs |
| `M2StaticBatchMaterializer.materialize_batch` | Internal M2 scene-materialization service | Builds and attaches one prepared-Mesh MultiMesh transform slice | Renderer main thread; stateless after each call | Invalid/empty input returns null; bounds are caller precondition |
| `M2RuntimeMeshRebuildClassifier` | Internal memoized M2 service | Detects billboard/UV-rotation metadata requiring stale cached-mesh rebuild | Renderer main thread; cached until reset | Invalid variants/indices skipped; first path decision wins |
| `M2AnimationLoadPipelineState` | Internal M2 async-state service | Owns animated scene pending request records and terminal finalize FIFO | Renderer main thread; map/session | Empty/duplicate/unknown transitions rejected |
| `M2AnimationResourceFinalizer` | Internal M2 terminal-I/O service | Polls cached animation requests, loads/finalizes scenes and publishes prototype outcome | Renderer main thread; stateless across calls | Invalid/failed candidates mark static-only |
| `M2AnimatedSceneFinalizer` | Internal M2 scene-finalization service | Instantiates candidates, repairs materials and requires AnimationPlayer descendants | Renderer main thread; stateless after each call | Invalid/rejected detached roots are freed |
| `M2AnimationPlaybackController` | Internal M2 playback service | Applies stable phase, default imported animation and native animator startup | Renderer main thread; stateless after each call | Missing inventories/names no-op through historical fallbacks |
| `M2AnimatedInstanceMaterializer` | Internal M2 scene-materialization service | Duplicates ordered animated instances, applies render settings, starts playback and attaches a non-empty batch | Renderer main thread; stateless after each call | Invalid/empty input or all failed duplicates returns empty |
| `M2MeshLoadPipelineState` | Internal M2 async-state service | Owns static Mesh pending request records and terminal finalize FIFO | Renderer main thread; map/session | Empty/duplicate/unknown transitions rejected |
| `M2MeshResourceCacheState` | Internal M2 Resource cache | Owns prepared static Mesh references by normalized path | Renderer main thread; final shutdown | Empty path/null Mesh rejected; same path replaces |
| `M2MeshResourceExtractor` | Internal M2 scene/resource service | Selects first Mesh from direct Resource, PackedScene or Node subtree | Renderer main thread; stateless except temporary instance | Invalid/no Mesh returns null; temporary PackedScene root freed |
| `M2MeshResourceFinalizer` | Internal M2 terminal-I/O service | Polls static requests, extracts/prepares terminal Meshes and publishes cache/missing outcomes | Renderer main thread; stateless across calls | Invalid/failed Resources mark missing; one call pops at most one terminal record |
| `M2RuntimeMeshFinalizer` | Internal M2 preparation service | Owns refresh version, rebuild classification, M2Builder rebuild and fallback | Renderer main thread; decisions cached until reset | Null returns null; missing/failed rebuild marks and reuses original Mesh |
| `M2RawModelRepository` | Internal M2 native repository | Reads static/animated raw Dictionaries through exact M2Loader methods | Synchronous; stateless | Invalid/unavailable/non-Dictionary result returns empty Dictionary |
| `M2PrototypeCacheState` | Internal M2 prototype cache | Owns detached static/animated Nodes and missing/static-only outcomes | Renderer main thread; final shutdown | Invalid admission rejected; first valid prototype wins |
| `M2NativeAnimationResourceObserver` | Internal native M2 resource observer | Selects GryphonRoost, reads/builds and publishes prototype/static-only outcome | Synchronous renderer main thread; stateless | Invalid/unavailable candidates return null; failures mark static-only |
| `WmoPlacementResolver.normalize_relative_path/resolve_unique_key/resolve_world_transform` | Internal pure WMO service | Resolves cache key, registry identity and world transform | Main/any thread; stateless | Missing UID uses tile/index fallback; transform fields use historical defaults |
| `WmoPlacementRegistry.add_reference/release_reference/contains/active_count/diagnostic_snapshot/clear` | Internal WMO service | Owns placement-key to tile/global reference sets | Renderer main thread; map session | Empty/unknown/non-owner input is rejected without mutation |
| `WmoRenderBuildStepPlanner.plan_step` | Internal pure WMO service | Selects one mesh-first lightweight render-group operation and next cursors | Main/any thread; stateless | Raw integer comparisons are preserved without clamping |
| `WmoRenderBuildQueue` / `WmoRenderBuildJob` | Internal WMO pending-state service | Owns typed root/resource/cursor jobs and FIFO placement keys | Renderer main thread; map session | Invalid enqueue rejected; duplicate/stale behavior preserved |
| `WmoRenderResourceCacheState` | Internal WMO cache-state service | Owns validated Resources, negative entries and pending cache paths | Renderer main thread; map/cache session | Invalid/occupied request and unknown completion are rejected |
| `WmoRenderResourceFinalizer` | Internal WMO terminal-I/O service | Polls lightweight render requests, validates script/format and publishes Resource/missing outcomes | Renderer main thread; stateless across calls | Non-terminal retained; failed/null/wrong/stale complete missing |
| `WmoSceneResourceCacheState` | Internal WMO cache-state service | Owns validated PackedScenes, negative entries and pending `.tscn` paths | Renderer main thread; map/cache session | Direct missing and terminal request transitions remain distinct |
| `WmoSceneResourceFinalizer` | Internal WMO terminal-I/O service | Polls cached scene requests, validates/frees probes and publishes scene/missing outcomes | Renderer main thread; stateless across calls | Failed/wrong/stale scenes complete missing; probes always released |
| `AdtWaterLoadPipelineState` | Internal liquid async-state service | Owns ADT water FIFO/dedupe, active task IDs and mutex result mailbox | Main-thread state; worker result publication | Invalid/duplicate requests rejected; clear does not interrupt workers |
| `AdtWaterSceneFinalizer.attach_water_scene` | Internal liquid main-thread service | Builds and attaches one existing-format ADT Water subtree | Main thread; stateless, returned Node tile-owned | Empty/invalid/dry input returns null without attachment |

Публичным contract не считаются `StreamingWorldLoader` methods/properties,
внутренние dictionaries, queues, job records и generated node names. Scene-owned
loader configuration remains transitional composition data, not a caller API.

## Inputs and outputs

| Direction | Contract/data | Producer | Consumer | Ownership | Thread/lifetime |
|---|---|---|---|---|---|
| Input | `StreamingFocus` | Player/spectator/editor/capture adapter | `WorldRenderFacade` | Immutable caller value | Main thread/session |
| Input | Focus-source `NodePath` | Runtime/test scene composition | `WorldRenderFacade` source adapter | Scene-owned node, sampled position | Main thread/scene lifetime |
| Input | Ground-query `GodotWorldPosition` | Renderer probe/future adapter | `WorldRenderFacade` | Immutable caller-held value | One main-thread query |
| Input | `WorldEnvironmentSnapshot` | World-state/capture adapter | `WorldRenderFacade` / `WowSkyController` | Immutable caller-held value; not retained | One main-thread update |
| Input | `EntityPresentationSnapshot` | Future world-state/preview adapter | `WorldRenderFacade` / entity presenter | Immutable caller-held full visual snapshot | One main-thread present/update |
| Input | `EntityId` removal command | Future entity registry/adapter | `WorldRenderFacade` / entity presenter | Immutable session-local value | One main-thread removal |
| Input | Map/configuration | Scene/app/editor | `StreamingWorldLoader` | Caller config, copied/read | Main thread/session |
| Input | WDT/ADT/M2/WMO/BLP bytes | Extracted asset repository | Native loaders/builders | Loader result owns parsed data | Worker or controlled load |
| Input | Baked resources | Cache build tools | Streamer/builders | Shared immutable resource/cache entry | Session/cache lifetime |
| Test input | Server-spawn render manifest | Coordinate fixture/verifier | Checkpoint capture tool | Repository-owned diagnostic data | Test-process lifetime |
| Output | `StreamingTargetPlan` | `StreamingTargetPlanner` | Streamer queue/state apply | Immutable ephemeral value | One refresh |
| Internal control | Per-frame lane limits and boolean permits | Streamer configuration / `RenderBudgetScheduler` | Ordered streamer drains | Scheduler-owned counters | Main thread/frame |
| Internal cache | Full-quality terrain Mesh/source | Loader terrain upgrade / `TerrainQualityMeshCache` | Revisited tile state | Cache-retained Mesh reference | Map session until eviction/reset |
| Internal plan | Parsed chunks, typed focus and immutable chunk-LOD policy | Loader / `TerrainChunkLodPlanner` | Loader desired state | Fresh dictionary; no retained resources | One target refresh |
| Internal plan | Current/desired chunk state and typed focus | Loader / `TerrainChunkGeometryQueuePlanner` | Loader chunk queues | Fresh request arrays; no retained resources | One queue rebuild |
| Internal registry | Tile key and M2 placement unique IDs | Loader / `M2UniquePlacementRegistry` | Filtered grouping input and tile retry state | Registry-owned strings; fresh result arrays | Map session |
| Internal transform | Rotation/path/scale | Loader or grouper / `M2PlacementTransformResolver` | Group/placeholder/instance transforms | Value-only Basis/Vector3 | One placement |
| Internal grouping | Tile origin, M2 names and placements | Loader / `M2PlacementGrouper` | Loader worker result/build job | Fresh Dictionary/Transform3D arrays | One grouping task |
| Internal batch plan | Transform count/offset, path kind and limits | Loader / `M2BuildBatchPlanner` | Loader materialization/cursor adapter | Fresh scalar Dictionary | One build operation |
| Internal M2 dispatch plan | Batch count and observed animation/static resource state | Loader / `M2BuildDispatchPlanner` | Loader queue/materializer/progress adapter | Fresh scalar/action Dictionary | One build operation |
| Internal M2 resource observation | Normalized path, optional prototype/Mesh and pending/missing flags | Loader / M2 observers / `M2BuildResourceSnapshot` | Dispatch planner and loader materializer adapter | Snapshot borrows exact engine references | One build operation |
| Internal M2 pending build | Tile key, M2 root, grouped transforms and cursors | Loader / `M2BuildQueue` | Loader readiness, planner and materializer adapters | Queue-owned job/keys and strong references | Until finish/cancel/clear/replacement |
| Internal static M2 materialization | Parent, prepared Mesh, ordered transform slice and render settings | Loader / `M2StaticBatchMaterializer` | Attached MultiMeshInstance3D | Parent owns node/MultiMesh; exact Mesh reference retained | One main-thread build batch |
| Internal WMO placement | Path, MODF placement, tile/index | Loader / `WmoPlacementResolver` | WMO caches, registry and three instance adapters | Value-only String/Transform3D | Lookup/placement lifetime |
| Internal WMO ownership | Resolved placement key and tile/global reference key | Loader / `WmoPlacementRegistry` | Loader create/retain/final-free decisions | Registry-owned String sets; detached diagnostics | Map session or final release |
| Internal WMO build step | Mesh/MultiMesh counts and job cursors | Loader / `WmoRenderBuildStepPlanner` | Loader materialization/cursor adapter | Fresh scalar Dictionary | One group operation |
| Internal WMO pending build | Placement key, Node3D root, WMO Resource and cursors | Loader / `WmoRenderBuildQueue` | Loader drain and step planner adapter | Queue-owned job and strong references | Until cancel/clear/replacement |
| Internal WMO render cache | Normalized path, cache path and validated Resource | Loader / `WmoRenderResourceCacheState` | Loader lookup, ResourceLoader poll and build queue | State-owned Resource/path references; detached request snapshots | Until transient/full clear |
| Internal WMO scene cache | Normalized path, `.tscn` path and validated PackedScene | Loader / `WmoSceneResourceCacheState` | Loader lookup, request poll and scene instantiation | State-owned PackedScene/path references; detached request snapshots | Until transient/full clear |
| Internal ADT water load | Tile key, ADT path, task ID and parsed Dictionary | Loader/worker / `AdtWaterLoadPipelineState` | Loader task start, budgeted drain and finalization | State-owned records; mutex result mailbox | Request through result completion/reset |
| Internal raw M2 read | Extracted directory and normalized relative path | Loader/native observer via `M2RawModelRepository` | Finalizer, static or animated builder adapters | Fresh Dictionary; repository retains nothing | One synchronous native call |
| Internal animated M2 load | Normalized path, cached GLB path and opaque terminal status | Cached observer / loader / `M2AnimationLoadPipelineState` | Loader poll/finalize adapters | State-owned String/status records; detached pending snapshots | Request through terminal finalize/reset |
| Internal animated M2 candidate | Loaded PackedScene, static material root and detached candidate | Loader / `M2AnimatedSceneFinalizer` | Loader prototype adoption/static fallback | Finalizer owns until rejection or exact-root transfer | One main-thread finalize permit |
| Internal animated M2 playback | Prototype/instance native animators, path/index and player inventory | Materializer/finalizer / `M2AnimationPlaybackController` | Native and imported animation state | Borrowed Nodes; detached optional diagnostics | One duplicated instance startup |
| Internal animated M2 materialization | Parent, prototype, ordered transform slice and render settings | Loader / `M2AnimatedInstanceMaterializer` | Attached animated batch and indexed diagnostics | Parent owns batch; caller owns detached diagnostics | One main-thread build batch |
| Internal M2 prototype state | Normalized path, adopted static/animated Node or negative outcome | Loader / `M2PrototypeCacheState` | Loader reuse/fallback adapters | State-owned strong Node refs and Strings; detached diagnostics | Until final shutdown |
| Output | Desired tile/detail operations | Streamer plan application | Finalize queues | Loader-owned | Cross-frame |
| Output | Terrain/M2/WMO/liquid instances | Loader/builders | Godot world/renderer | Loader/world owner | Main-thread attach |
| Output | Detached renderer metrics | `WorldRenderFacade` | Capture/baseline tools | Caller-owned deep copy | On demand |
| Output | `RenderedGroundSample` | `WorldRenderFacade`/loaded terrain | Renderer diagnostics | Immutable caller-held value | One query |
| Output | Detached rendered-ground snapshot | `WorldRenderFacade` | Terrain-height probe | Caller-owned deep copy | One query |
| Output | Entity visual Node3D subtree | `WorldEntityPresenter` | SceneTree/viewport | Presenter-owned child | Until replace/remove/teardown |
| Output | Detached entity inventory | `WorldRenderFacade` | Diagnostics/tests | Caller-owned deep copy | One query |
| Output | Logs/diagnostics | Hitch/stat instrumentation | Logs/baseline tools | Immutable records | Periodic/frame |
| Test output | Diagnostic spawn marker and cold/warm PNGs | Checkpoint capture tool | Human/integrator review | SceneTree marker; `user://` files | One capture process |

Side effects:

- reads extracted files and generated caches;
- creates/frees scene nodes, meshes, materials, MultiMeshes and RIDs;
- submits worker tasks;
- mutates shader globals/environment through render/sky paths;
- writes logs and baseline captures through tools.

## Data flow

```mermaid
flowchart TD
    PlayerSource[Player/spectator Node3D] --> A[Explicit scene adapter]
    C[Capture camera] --> A
    SF[Pinned server spawn] --> SM[Validated spawn manifest]
    SM --> C
    SM --> Marker[Renderer-native origin marker]
    E[Editor viewport] --> EA[Editor adapter]
    A --> F[StreamingFocus]
    EA --> F
    F --> RF[WorldRenderFacade]
    RF --> Planner[StreamingTargetPlanner]
    Planner --> T[StreamingTargetPlan apply]
    WDT[WDT tile catalog] --> Planner
    T --> Q[Tile load queue]
    Q --> Parse[Worker parse/cache load]
    Parse --> R[Result queues]
    R --> TerrainCache[TerrainQualityMeshCache store]
    TerrainCache --> Revisit[Revisited tile state restore]
    R --> ChunkLod[TerrainChunkLodPlanner]
    ChunkLod --> DesiredChunkLod[Desired chunk LOD state]
    DesiredChunkLod --> ChunkQueue[TerrainChunkGeometryQueuePlanner]
    ChunkQueue --> B
    R --> M2Registry[M2UniquePlacementRegistry reserve]
    M2Registry --> M2Grouper[M2PlacementGrouper]
    M2Transform[M2PlacementTransformResolver] --> M2Grouper
    M2Grouper --> M2Batch[M2BuildBatchPlanner]
    M2Grouper --> M2Queue[M2BuildQueue]
    M2Queue --> M2Batch
    M2Batch --> M2Resources[M2BuildResourceSnapshot]
    M2Resources --> M2Dispatch[M2BuildDispatchPlanner]
    M2Dispatch --> M2Static[M2StaticBatchMaterializer]
    M2Static --> M2
    R --> WmoPlacement[WmoPlacementResolver]
    WmoPlacement --> WmoRegistry[WmoPlacementRegistry]
    WmoRegistry --> WmoBuildQueue[WmoRenderBuildQueue]
    WmoBuildQueue --> WmoBuildStep[WmoRenderBuildStepPlanner]
    WmoBuildStep --> WMO
    R --> B[RenderBudgetScheduler permits]
    B --> Terrain[Terrain attach/upgrade]
    B --> M2[M2 group/MultiMesh attach]
    B --> WMO[WMO instance/group attach]
    B --> Liquid[Liquid attach]
    Loaded[Loaded terrain Mesh and Transform] --> Ground[Facade ground query]
    Ground --> GroundSample[RenderedGroundSample / detached diagnostics]
    WorldTime[Authoritative/test time] --> EnvironmentSnapshot[WorldEnvironmentSnapshot]
    EnvironmentSnapshot --> RF
    RF --> SkyController[WowSkyController]
    DBC[Light/Area/Skybox DBC] --> SkyController
    SkyController --> World
    EntityReadModel[Entity visual read model] --> EntitySnapshot[EntityPresentationSnapshot]
    EntitySnapshot --> RF
    RF --> EntityPresenter[WorldEntityPresenter]
    EntityAsset[PackedScene path] --> EntityPresenter
    EntityPresenter --> World
    Terrain --> World[Godot world]
    M2 --> World
    WMO --> World
    Liquid --> World
    Marker --> World
    F --> Eviction[Eviction/retention decisions]
    Eviction --> World
```

## Lifecycle/state

```mermaid
stateDiagram-v2
    [*] --> Initializing
    Initializing --> WaitingForFocus: WDT/catalog/config ready
    Initializing --> Degraded: missing loaders/data/cache
    WaitingForFocus --> Streaming: valid StreamingFocus
    Streaming --> Streaming: load/finalize/evict ticks
    Streaming --> WaitingForFocus: world reset without replacement focus
    Streaming --> SwitchingMap: map/focus reset
    SwitchingMap --> Initializing
    WaitingForFocus --> ShuttingDown
    Degraded --> ShuttingDown
    Streaming --> ShuttingDown
    ShuttingDown --> [*]
```

## Main sequence

```mermaid
sequenceDiagram
    participant Source as Player/Editor/Capture source
    participant Focus as StreamingFocus adapter
    participant Facade as WorldRenderFacade
    participant Stream as StreamingWorldLoader internal
    participant Planner as StreamingTargetPlanner
    participant Worker as Worker task
    participant Budget as RenderBudgetScheduler
    participant Render as SceneTree/RenderingServer
    Source->>Focus: sample explicit Godot position
    Focus->>Facade: set/refresh typed focus
    Facade->>Stream: delegate focus and refresh
    Stream->>Planner: typed focus, catalog and target policy
    Planner-->>Stream: immutable wanted/retained plan
    Stream->>Stream: queue priority and loaded-tile LOD/detail state
    Stream->>Worker: parse/load tile and detail data
    Worker-->>Stream: immutable result
    Stream->>Budget: begin_frame(operation limits)
    Stream->>Budget: try_consume_permit(lane)
    Budget-->>Stream: true while lane remains bounded
    Stream->>Render: attach permitted terrain/M2/WMO/liquid work
    Stream->>Render: evict outside retention range
    Source->>Facade: sample_ground_height(typed position)
    Facade->>Stream: sample loaded render terrain
    Stream-->>Facade: RenderedGroundSample / diagnostic snapshot
    Source->>Facade: apply_environment_snapshot(exact time)
    Facade->>Render: delegate to WowSkyController
    Render->>Render: freeze local clock; retain DBC sampling/apply rules
    Source->>Facade: present_entity(full visual snapshot)
    Facade->>Render: delegate to WorldEntityPresenter
    Render->>Render: create/update/replace owned entity root
    Source->>Facade: remove_entity(EntityId)
    Facade->>Render: detach and queue_free owned root
    Stream->>Budget: shutdown: cancel permit issuance
    Stream->>Worker: shutdown: wait for WorkerThreadPool tasks
    Stream->>Stream: shutdown: finish registered ResourceLoader requests
    Stream->>Render: clear queues and owned tree nodes/RIDs
    Stream->>Stream: free detached prototypes and release resource caches
```

## Ownership, threading and resources

- `StreamingWorldLoader` владеет tile states, queues, task registries, active world instances и render caches session scope.
- `WorldRenderFacade` owns only scene-relative adapter paths. It does not own the
  streamer, environment controller, focus source, returned metrics, queues,
  caches, nodes or RIDs.
- `WorldEnvironmentSnapshot` is an immutable caller-owned scalar value. Neither
  facade nor sky controller retains it; the controller copies normalized hours
  into its existing fixed-clock fields on the main thread.
- `WowSkyController` continues to own DBC sampling state and mutations of its
  duplicated Godot `Environment`, sun, skybox node and world shader globals.
- `WorldEntityPresenter` owns one optional visual Node3D subtree per presented
  `EntityId`; it owns no authoritative entity state and excludes the local player.
- Entity presentation snapshots remain caller-owned inputs. Detached diagnostics
  expose only identity debug keys, paths and visibility, never Node/Resource/RID.
- `TerrainQualityMeshCache` owns only full-quality revisit Mesh references and
  LRU keys. The loader retains terrain tasks/results, tile state, source choice,
  cache versions and every material/Node/RID finalization side effect.
- `TerrainChunkLodPlanner` is stateless and owns only call-local horizontal
  distance calculations. The loader retains parsed chunks, desired state,
  queues, budgets and all Mesh/Node/RID application side effects.
- `TerrainChunkGeometryQueuePlanner` is stateless and owns only call-local
  create/remove request calculation and sorting. The loader adopts the fresh
  arrays and retains removal-first drains, budgets and render side effects.
- `M2UniquePlacementRegistry` owns only positive unique-key to tile-key strings.
  The loader retains owned/skipped tile arrays, candidate retry, grouping/build
  tasks, caches and all MultiMesh/Node/Mesh/material/RID side effects.
- `M2PlacementTransformResolver` is stateless and retains no resources. The
  grouper owns worker-path final transforms; direct placeholder/instance
  transforms and every build/render side effect remain loader-owned.
- `M2PlacementGrouper` is stateless and owns only call-local grouped transforms.
  The loader retains tasks, mutex/result queues and stale-result checks; accepted
  groups enter `M2BuildQueue` as typed pending jobs.
- `M2BuildBatchPlanner` is stateless and owns only call-local scalar plans.
  `M2BuildDispatchPlanner` is stateless and owns only call-local action/transition
  plans after the loader observes resource availability. `M2BuildResourceSnapshot`
  carries those per-step observations and borrows exact prototype/Mesh references
  without controlling engine lifetime.
  `M2BuildQueue` owns typed pending jobs, FIFO/stale keys, grouped-transform
  references and group/offset/serial cursors without freeing engine objects.
  `M2StaticBuildResourceObserver` owns static Mesh lookup/request admission and
  snapshot adoption. `M2CachedAnimationResourceObserver` owns cached animated
  prototype lookup, GLB policy/request admission and snapshot production.
  `M2NativeAnimationResourceObserver` owns native candidate selection, raw read,
  detached build and prototype/static-only cache outcome.
  `M2StaticBatchMaterializer` owns static MultiMesh construction/attachment; the
  loader retains action execution, cursor adoption, root cleanup, budgets and
  Editor ownership.
- `WmoPlacementResolver` is stateless and owns only call-local cache-key,
  identity and transform values. `WmoPlacementRegistry` owns only placement-key
  reference sets. `WmoRenderBuildStepPlanner` owns only a call-local operation
  and cursor plan. `WmoRenderBuildQueue` owns typed pending jobs, FIFO keys and
  strong root/resource references without freeing engine objects.
  `WmoRenderResourceCacheState` owns validated render Resources, negative entries
  and pending cache paths; `WmoRenderResourceFinalizer` owns its terminal
  ResourceLoader polling and script/format validation. `WmoSceneResourceCacheState`
  similarly owns validated PackedScenes, negative entries and pending `.tscn`
  paths; `WmoSceneResourceFinalizer` owns terminal ResourceLoader I/O and
  validation-probe lifetime. The loader retains request admission, FileAccess
  size checks, live fallback, materialization, permits, validity reactions and
  every placed-Node lifecycle action.
- `AdtWaterLoadPipelineState` owns pending request order/deduplication, opaque
  active task IDs and the worker-safe parsed-result mailbox. The loader retains
  WorkerThreadPool start/wait, ADTLoader parsing, concurrency/finalize permits,
  stale tile/path/root checks and `water_loaded` timing. `AdtWaterSceneFinalizer`
  performs the existing ADTBuilder call, tile attach and optional recursive
  Editor ownership on the main thread without retaining the generated subtree.
- `M2RuntimeMeshRebuildClassifier` owns only normalized-path boolean decisions
  for billboard/UV-rotation material refresh and is composed by the runtime Mesh
  finalizer. The raw repository loads value data; loader retains Mesh adoption.
- `M2MeshLoadPipelineState` owns static M2 pending Resource paths, opaque
  terminal statuses and completion-order finalize FIFO. The static observer owns
  cache path selection, request admission and initial snapshot adoption. The
  Mesh resource finalizer owns ResourceLoader polling/finalize and terminal
  adoption; loader retains permits and composition, while prototype cache state
  owns shared missing outcomes.
- `M2AnimationLoadPipelineState` owns animated M2 pending Resource paths, opaque
  terminal statuses and completion-order finalize FIFO. The cached animation
  observer owns allow/deny/path/GLB selection, request admission and initial
  snapshot production. The native observer owns synchronous native build; the
  animation resource finalizer owns cached terminal polling/load/finalize and
  adoption. Loader retains permits and material-prototype lookup.
- `M2MeshResourceCacheState` owns prepared static Mesh references and releases
  them at the existing final-shutdown site. Prototype state and materialization
  belong to the sibling cache service and loader respectively.
- `M2MeshResourceExtractor` owns depth-first first-Mesh selection and temporary
  PackedScene instance destruction. The static observer admits ResourceLoader
  requests and initial cache/missing adoption; the Mesh resource finalizer owns
  terminal extraction/adoption, while the loader retains materialization.
- `M2RuntimeMeshFinalizer` owns refresh version `2`, classifier lifetime,
  M2Builder rebuild and original-Mesh fallback. `M2MeshResourceFinalizer` loads
  raw data only after the runtime finalizer reports that a cached Mesh is stale.
- `M2RawModelRepository` owns FileAccess/ClassDB availability and the exact
  `load_m2`/`load_m2_animated` calls. The loader retains normalization, fallback
  order and every result consumer; `M2PrototypeCacheState` retains outcomes.
- `M2PrototypeCacheState` owns exact static/animated prototype references,
  missing-model and static-animation path sets, duplicate-candidate release and
  final-shutdown Node cleanup. ResourceLoader, builders and fallback decisions
  remain loader-owned.
- Rendered-ground query results and diagnostic snapshots are caller-owned values;
  the facade never returns Mesh, Node, tile-state or queue references.
- Loaded-mesh ground sampling is renderer diagnostics, not authoritative gameplay
  collision. M02 `TerrainQuery` composition and ADT cache ownership remain unchanged.
- `StreamingTargetPlanner` is stateless and owns only call-local calculations;
  its immutable plan is consumed synchronously by the streamer.
- `RenderBudgetScheduler` owns only per-frame lane counters and a terminal
  cancellation flag. The streamer retains queue ordering and all operation side effects.
- Focus producers own the immutable `StreamingFocus` reference; the loader retains
  the latest reference and converts it to `Vector3` only inside the render boundary.
- Worker tasks не должны менять SceneTree и shared Resource concurrently.
- Parsed/grouped results передаются обратно через guarded result queues.
- Mesh/material/node/RID finalization выполняется main thread и ограничивается exported budgets.
- Shutdown/map switch обязан дождаться WorkerThreadPool jobs и зарегистрированных threaded ResourceLoader requests до очистки очередей, nodes, caches и RIDs.
- Parented streamed nodes остаются owned by SceneTree during shutdown; detached M2/WMO prototype caches are explicitly `free()`d after asynchronous work drains.
- A temporary liquid root with no generated child geometry is explicitly freed by `ADTBuilder` instead of being returned or abandoned.
- Cache resources считаются immutable после публикации.

## Errors, cancellation and recovery

| Failure | Detection | Behavior | Diagnostic | Recovery |
|---|---|---|---|---|
| Missing WDT/ADT | File/catalog check | Tile/map unavailable | Loader warning/error | Fix extraction/profile, reload |
| Missing focus source | Explicit NodePath resolution | Retain current streamed content and prior valid focus | One warning until source recovers | Fix composition path or call `set_streaming_focus` |
| Missing renderer implementation | Facade path/method validation | Focus/metrics call fails without mutation | One facade diagnostic until recovery | Fix scene composition path/implementation |
| Invalid metrics result | Facade return-type validation | Return empty caller snapshot | Facade error | Restore `Dictionary` implementation contract |
| Invalid environment time | Snapshot finite-value validation | Reject update; retain prior sky clock | `environment_time_not_finite` on invalid value | Supply a finite time snapshot |
| Missing environment controller | Facade path/method validation | Reject environment update; other facade APIs remain available | One facade diagnostic until recovery | Fix scene composition path/implementation |
| Invalid entity visual snapshot | Contract validation | Reject without scene mutation | Stable `entity_presentation_*` failure code | Repair adapter read model and resend |
| Missing/invalid entity visual asset | Resource existence/load/root check | New entity absent or prior replacement retained | Named presenter warning | Restore asset mapping and resend snapshot |
| Missing entity presenter | Facade path/method validation | Reject entity commands; other facade APIs remain available | One facade diagnostic until recovery | Fix runtime scene composition |
| No focus supplied | Refresh contract | No target recomputation; queues continue draining | `refresh_streaming_focus()` returns `false` | Supply player/editor/capture focus |
| Cache version mismatch | Required format constant | Reject stale cache/fallback | Version diagnostic | Rebuild matching cache |
| Worker failure | Task result/empty data | Skip/degrade affected asset | Queue/task warning | Retry/rebuild source |
| Main-thread hitch | Named section timing | Frame spike, work remains queued | `HITCH` log | Lower budget/fix finalize path |
| Render terrain unavailable | Facade ground query | Immutable unavailable sample | Stable `render_terrain_*` failure code and optional snapshot | Wait for streaming or use gameplay-owned query backend |
| D3D12 descriptor exhaustion | Rendering backend error | Render failure/fallback backend | Godot error + baseline report | Dedup resources/fix settings |
| Teleport/map change | Focus/session transition | Old jobs become stale | Target/session generation | Cancel/drop stale results |
| Shutdown leak | Godot leak/RID diagnostics | Resource retained | Verbose shutdown report + cache shutdown verifier | Drain requests, preserve tree ownership, then free detached prototypes and clear resource caches |

## Configuration and capabilities

| Setting/capability | Default | Profile | Runtime mutable | Effect |
|---|---|---|---|---|
| Quality preset | Scene-specific | All | Limited | Applies radii and finalize budgets |
| Terrain control splat | Enabled in current High paths | Render | Limited | Near terrain texture quality |
| M2/WMO/liquids | Scene/profile-specific | Render | Debug/config | Enables asset categories |
| Runtime stats/hitch profiler | Usually debug | Dev/test | Yes | Observability cost |
| Shadow flags | Mostly disabled/limited | Blizzlike/Enhanced | Profile | CPU/GPU cost and visuals |

Exact exported settings and cache versions remain documented in [`../../RENDER.md`](../../RENDER.md) until extracted services receive individual specs.

## Persistence, cache and migration

- `StreamingFocus` is runtime-only and is not serialized. Scene migration adds
  `streaming_focus_source_path`; existing `camera_path` remains valid only for
  optional automatic overview positioning.
- Renderer reads caches under `data/cache`; caches are not committed.
- Format changes require `FORMAT_VERSION`/required-version bump and rebuild instructions.
- Atomic cache publication and unified manifest are target-state work from FND/M03.
- Material-only changes may refresh without geometry rebake only when documented safe.

## Diagnostics and observability

- Logs: `HITCH`, `PERF`, `TERRAIN_QUALITY`, `SKY_LIGHT`, `SKYBOX_MODEL`.
- API snapshot: `WorldRenderFacade.renderer_metrics_snapshot()` returns detached
  queue/cache/activity counts without exposing mutable renderer state.
- Metrics: queue depths, active tiles/assets, named finalize times, frame percentiles and max hitch.
- Debug views: render checkpoint scenes/captures; future streaming/LOD/portal overlays.
- Correlation IDs: currently mostly tile/path keys; target architecture adds session/job IDs.

## Verification

- Unit/contract tests: streaming-focus contract/wiring, material mapping, unique-ID dedupe, placement probes, baseline manifest, five-point coordinate calibration, synthetic perceptual checkpoint diff, camera-pose grid plan.
- Pure planner contract: center/corner/catalog/clamp/editor cases plus bounded
  High-like iteration timing without loading a world scene.
- Terrain chunk LOD contract: horizontal chunk-center distance, inclusive
  thresholds, sparse indices, disabled/raw-custom policy, loader delegation and
  bounded 250-by-256 planning without loading a world scene.
- Terrain chunk geometry queue contract: current/desired comparison, tile-LOD
  takeover, sparse origin fallback, stable removals, nearest creates, loader
  drain boundary and bounded multi-tile timing without a world scene.
- M2 unique placement contract: unkeyed pass-through, within-call/cross-tile
  dedupe, owner release/retry, clear, detached diagnostics, loader boundary and
  bounded reserve/release timing without a world scene.
- M2 placement transform contract: regular/cliffrock/waterfall formulas, path
  normalization, scale compensation, all three consumers and bounded timing.
- M2 placement grouper contract: invalid/default records, historical path rules,
  group order, local transforms, fresh output, source boundary and bounded timing.
- M2 build batch contract: static/animated limit selection, clamp, remaining
  count, completion/cursor rules, source boundary and bounded timing.
- WMO placement contract: cache-path normalization, positive/fallback identity,
  default/rotated/unclamped transforms, three consumers and bounded timing.
- WMO placement registry contract: first/idempotent/shared/non-owner/final/global
  lifecycle, detached sorted diagnostics, source ownership and bounded timing.
- WMO render build step contract: mesh-before-MultiMesh order, one-index cursor
  transition, completion/raw integer behavior, source ownership and bounded timing.
- WMO render build queue contract: typed references/cursors, FIFO, duplicate
  replacement, stale-front cleanup, cancel/clear engine lifetime and bounded timing.
- WMO render Resource cache contract: invalid/duplicate request rejection,
  validated/missing terminal transitions, transient/full reset, detached sorted
  diagnostics, loader-owned version validation and bounded timing.
- WMO scene Resource cache contract: direct missing sources, pending terminal
  transitions, transient/full reset, detached diagnostics, loader-owned size/
  metadata validation and bounded timing.
- ADT water load pipeline contract: FIFO/dedupe, active task identity, real
  worker-thread publication, pending-only cancellation, result payload/order,
  clear/source boundaries and bounded timing.
- Budget scheduler contract: exact lane exhaustion, shared chunk removal/create
  priority, independent lanes, frame reset, invalid limits, terminal cancellation,
  dependency boundaries and bounded permit timing without loading a world scene.
- Internal-access contract: derives the current streamer's private queue/task/
  cache/state field inventory and rejects external member/reflection access from
  gameplay or EditorPlugin package code.
- Ground-query facade contract: available/unavailable typed result delegation,
  detached nested diagnostics and terrain-probe source migration without private access.
- Rendered-ground value contract: available/non-finite/unavailable invariants pass
  from a cold Godot class cache before editor import.
- Integration/E2E: Eastern Kingdoms/Kalimdor streaming scenes, seven M00
  cold/warm checkpoints and one dedicated mapped server-spawn checkpoint.
- Fidelity evidence: семь локальных build 12340 reference JPG покрывают terrain/ADT/M2/WMO/liquid/sky и реальный `GryphonRoost01`; automated cold/warm metrics имеют `compared=14`, `missing=0`. Sky использует приблизительно paired camera, а animated-M2 остаётся asset-paired/placement-unpaired из-за synthetic probe.
- Performance budgets: M00 report records cold/warm p95 and max hitch; no final acceptance threshold yet.
- Manual diagnostics: [`../RENDER_BASELINE.md`](../RENDER_BASELINE.md) and [`../../RENDER.md`](../../RENDER.md).

## Extension points

- Target `WorldRenderFacade` for runtime/editor/capture callers.
- Extend `StreamingFocus` with measured direction/velocity needs when the pure planner is extracted.
- Extracted planner, budget scheduler, terrain, M2, WMO, liquid, sky and character services.
- Separate Blizzlike/Enhanced material and quality profiles.

## Capability status

| Capability | Status | Evidence | Gap/next step |
|---|---|---|---|
| ADT streaming/terrain | Partial | M00 checkpoints and current scenes | Fidelity/performance gaps remain |
| Static M2 placement | Partial | MultiMesh/dedupe probes | Full materials/animation/effects |
| M2 static batch materializer | Implemented extraction | Synthetic node/Mesh/render/source/timing contract | Asset-backed traversal/visual/GPU p95/p99 pending |
| M2 unique placement registry | Implemented extraction | Scene-free ownership/lifecycle/timing contract and historical `uid:11785` smoke | Group/build/tasks/finalization and asset-backed p95/p99 remain pending |
| M2 placement transform resolver | Implemented extraction | Scene-free formula/source/timing contract across three consumers | Asset-backed visual recheck and general placement parity pending |
| M2 placement grouper | Implemented extraction | Scene-free validation/order/transform/source/timing contract | Worker/build state, spatial cells and asset-backed p95/p99 remain pending |
| M2 build batch planner | Implemented extraction | Scene-free limit/count/cursor/source/timing contract | Spatial cells and asset-backed p95/p99 remain pending |
| M2 build dispatch planner | Implemented extraction | Scene-free priority/action/transition/source/timing contract | Resource observation/orchestration and asset-backed traversal remain pending |
| M2 build resource snapshot | Implemented extraction | Typed identity/adoption/lifetime/source/timing contract | Resource observation service and asset-backed traversal remain pending |
| M2 static build resource observer | Implemented extraction | Cache/pending/path/request/source/timing contract | Asset-backed traversal pending |
| M2 cached animation resource observer | Implemented extraction | Cache/pending/policy/GLB/request/source/timing contract | Asset-backed traversal pending |
| M2 native animation resource observer | Implemented extraction | Candidate/cache/raw/build/adoption/source/timing contract | Asset-backed traversal/leak/p95/p99 pending |
| M2 animation resource finalizer | Implemented extraction | Status/FIFO/load/candidate/repair/adoption/source/timing contract | Asset-backed traversal/leak/p95/p99 pending |
| M2 mesh resource finalizer | Implemented extraction | Status/FIFO/load/extract/prepare/adoption/source/timing contract | Asset-backed traversal/leak/p95/p99 pending |
| M2 build queue | Implemented extraction | Typed lifecycle/FIFO/progress/lifetime/source/timing contract | Resource dispatch and asset-backed traversal remain pending |
| M2 animation load pipeline state | Implemented extraction | Synthetic lifecycle/FIFO/source/timing contract | Asset-backed traversal/leak/animation-fidelity/p95/p99 pending |
| M2 animated scene finalizer | Implemented extraction | Synthetic type/lifetime/material/player/source/timing contract | Asset-backed GLB traversal/material/animation comparison pending |
| M2 animation playback controller | Implemented extraction | Synthetic phase/selection/loop/native-copy/source/timing contract | Asset-backed animation timing/name/native comparison pending |
| M2 animated instance materializer | Implemented extraction | Synthetic order/transform/render/playback/attachment/source/timing contract | Asset-backed traversal/visual/leak/p95/p99 pending |
| M2 prototype cache state | Implemented extraction | Synthetic identity/negative/lifecycle/source/timing plus shutdown contract | Asset-backed traversal/leak/p95/p99 pending |
| WMO placement resolver | Implemented extraction | Scene-free path/identity/transform/source/timing contract | Asset-backed comparison pending |
| WMO placement registry | Implemented extraction | Scene-free ownership/lifecycle/source/timing contract | Build/resource state and asset-backed cross-tile corpus pending |
| WMO render build step planner | Implemented extraction | Scene-free order/cursor/source/timing contract | Asset-backed traversal p95/p99 pending |
| WMO render build queue | Implemented extraction | Typed lifecycle/order/ownership/source/timing contract | Materialization and asset-backed traversal/leak evidence pending |
| WMO render Resource cache state | Implemented extraction | Scene-free lifecycle/exclusivity/source/timing plus shutdown contract | Asset-backed traversal/leak evidence pending |
| WMO render Resource finalizer | Implemented extraction | Status/order/script/format/adoption/source/timing contract | Serialized/asset-backed corrupt-cache and leak evidence pending |
| WMO scene Resource cache state | Implemented extraction | Scene-free lifecycle/direct-missing/source/timing plus shutdown contract | Asset-backed traversal/leak evidence pending |
| WMO scene Resource finalizer | Implemented extraction | Status/order/type/probe/lifetime/adoption/source/timing contract | Serialized stale/oversize and asset-backed evidence pending |
| WMO rendering | Partial | Cached group rendering | Portals/rooms/material parity |
| ADT water load pipeline state | Implemented extraction | Scene-free FIFO/task/thread/source/timing contract | Parse/finalization and asset-backed traversal/leak evidence pending |
| Liquids | Partial | MH2O/MLIQ paths | LiquidType/depth/shore fidelity |
| Sky/light | Partial | DBC controller/logs | Zone transition paired validation |
| Character presentation | Prototype | Character creator/player experiment | Full customization/equipment states |
| Camera-independent streaming focus | Implemented | Typed contract, two player-focused runtime scenes and three explicitly camera-focused diagnostic tools | Multi-focus/direction/velocity belong to planner extraction |
| Golden server-spawn visualization | Implemented | Pinned AzerothCore fixture, validated renderer manifest and diagnostic origin-marker capture at ADT `(32,48)`/MCNK `(3,12)` | No TrinityCore row or original-client visual-parity claim |
| Stable renderer facade | Implemented boundary / Partial fidelity | Facade contracts cover focus, environment, entity visuals, metrics and loaded-mesh ground query | Production consumers and fidelity remain |
| Environment snapshot input | Implemented boundary / Partial fidelity | Immutable time contract, facade/controller delegation and checkpoint migration | Weather/indoor state and paired zone-transition fidelity remain |
| Entity presentation commands | Implemented boundary / Prototype visuals | Versioned typed snapshot plus present/remove lifecycle and runtime service composition | Display/equipment/animation/effects and async scale path remain |
| Terrain quality Mesh cache service | Implemented extraction | Scene-free admission/LRU/clear contract and loader delegation | Remaining terrain build/state/finalization is monolithic |
| Terrain chunk LOD planner | Implemented extraction | Scene-free formula/dependency/timing contract and loader delegation | Queue/state/finalization and asset-backed p95/p99 remain pending |
| Terrain chunk geometry queue planner | Implemented extraction | Scene-free request/order/dependency/timing contract and loader delegation | Queue drains/state/finalization and asset-backed p95/p99 remain pending |
| Pure streaming target planner | Implemented | `M03-RND-STREAMING-PLANNER-001` asset-free contract/performance regression | Queue scheduling and loaded-tile LOD application remain in streamer |
| Bounded render budget scheduler | Implemented | `M03-RND-SCHEDULER-001` asset-free permit/cancellation/performance regression | Queue storage, worker concurrency and operation execution remain in streamer/services |
| Gameplay/editor/tool internal-access boundary | Implemented | Access gate scans gameplay, EditorPlugin packages and terrain probe against actual private streamer declarations | Add future renderer diagnostic tools explicitly to the protected list |
| Rendered terrain ground query | Implemented | `M03-RND-FACADE-GROUND-QUERY-001` typed result/snapshot isolation and probe migration | Diagnostic Mesh ray only; not movement/collision authority |

## Known gaps and risks

- Monolithic streamer mixes planning, jobs, caches and presentation.
- `camera_path` remains only for optional automatic overview positioning; it no
  longer drives runtime streaming or discovers the active viewport camera.
- Original-client paired fidelity evidence incomplete.
- Первый paired run выявил coordinate/placement mismatch: несколько совпадающих server-derived camera positions оказываются под terrain или внутри WMO/rocks OpenWC.
- Terrain-height probe исключил under-terrain состояние для всех пяти точек; waterfall exact-XZ miss классифицирован как TriangleMesh seam/edge и подтверждён nearby sample в 2 units.
- Camera-occluder probe не нашёл camera containment в пяти точках; paired mismatch локализован прежде всего в manual look direction/target/FOV calibration, с явным ограничением по RID-only geometry.
- Empirical FOV sweep выявил, что checkpoint camera должна явно вызывать `make_current()`; после исправления projection ranking остаётся inconclusive из-за неизвестного manual yaw/pitch/framing reference.
- Camera-pose sweep can now rank bounded yaw/pitch grids without changing manifest defaults; perceptual ranking remains diagnostic and requires human framing approval.
- The first Goldshire pose grid was invalidated by WMO readiness: the inn is absent after 2 seconds but visible after the manifest-standard 8-second wait. Pose comparisons must stabilize asynchronous checkpoint content first.
- A ready-scene Goldshire 3x3 grid improved mean error from `0.101402` at zero offsets to `0.087952` at yaw `10`/pitch `-10`; pitch/FOV refinement remains required before manifest calibration.
- Joint Goldshire pitch/FOV refinement had no human-approved optimum: full-frame error preferred grass-heavy FOV 62/pitch -25, while FOV 38/pitch -10 better matched building scale. Landmark/region scoring is required before calibration.
- Common-region scoring `[300,100,1400,650]` moved Goldshire's numeric optimum to FOV 38/yaw 10/pitch -15, but human inspection still found an oversized/cropped facade; semantic landmarks or masks remain required.
- Final paired audit compared fourteen cold/warm images for seven private build 12340 references with zero missing pairs; mean error ranges `0.066893..0.176955`. Animated-M2 native motion is observed across two original-client phases, but its real Lakeshire placement differs from the synthetic Goldshire probe. Sky-transition evidence uses the checkpoint map position/time with manually approved approximate framing.
- D3D12 descriptor issues remain. Explicit shutdown ownership removes the GUI capture's Node/resource/RID leaks in focused and seven-checkpoint runs; a timing-dependent ObjectDB warning for anonymous zero-reference `RefCounted` objects remains as a separate engine-teardown diagnostic.
- M2/WMO/material/particle/ribbon/portal parity incomplete.
- Public API is mostly exported configuration rather than stable contracts.
- Rendered-ground sampling generates a triangle mesh on demand and retains the
  historical nearby seam fallback. It is appropriate for diagnostics, not a
  per-physics-frame gameplay query or a claim of exact terrain collision parity.

## Source map

| Path | Responsibility |
|---|---|
| `src/render/world_render_facade.gd` | Stable caller boundary for typed focus/environment, detached metrics and rendered-ground queries |
| `src/render/environment/world_environment_snapshot.gd` | Immutable normalized world time input with explicit invalid state |
| `src/render/entities/entity_presentation_snapshot.gd` | Immutable contract-v1 entity visual input and validation |
| `src/render/entities/world_entity_presenter.gd` | Main-thread entity visual subtree ownership and lifecycle |
| `src/render/terrain/rendered_ground_sample.gd` | Immutable renderer-owned available/unavailable ground query result |
| `src/render/terrain/terrain_quality_mesh_cache.gd` | Full-quality terrain revisit Mesh retention and LRU ownership |
| `src/render/liquid/adt_water_load_pipeline_state.gd` | ADT water request/task/result bookkeeping and worker-safe mailbox |
| `src/render/liquid/adt_water_scene_finalizer.gd` | Main-thread ADT water build, tile attachment and optional editor ownership |
| `src/render/m2/m2_runtime_mesh_rebuild_classifier.gd` | Billboard/UV-rotation stale cached-mesh rebuild decision and memoization |
| `src/render/m2/m2_animation_load_pipeline_state.gd` | Animated M2 pending Resource paths, terminal statuses and finalize FIFO |
| `src/render/m2/m2_animation_resource_finalizer.gd` | Cached animation terminal polling/load/finalize outcomes |
| `src/render/m2/m2_animated_scene_finalizer.gd` | Animated scene candidate ownership, material repair and player validation |
| `src/render/m2/m2_animation_playback_controller.gd` | Per-instance phase, selection, native copy/start and imported playback |
| `src/render/m2/m2_animated_instance_materializer.gd` | Animated duplicate/render/playback startup and non-empty batch attachment |
| `src/render/m2/m2_static_batch_materializer.gd` | Static MultiMesh construction, render setup and attachment |
| `src/render/m2/m2_build_dispatch_planner.gd` | M2 wait/materializer/advance action priority and transition plan |
| `src/render/m2/m2_build_resource_snapshot.gd` | Typed per-step animated/static observations and borrowed references |
| `src/render/m2/m2_static_build_resource_observer.gd` | Static Mesh lookup/request/missing snapshot production |
| `src/render/m2/m2_cached_animation_resource_observer.gd` | Cached animated GLB policy/request/snapshot production |
| `src/render/m2/m2_build_job.gd` | M2 root/groups references and group/offset/serial progress |
| `src/render/m2/m2_build_queue.gd` | Keyed pending jobs and FIFO/stale tile-key lifecycle |
| `src/render/m2/m2_mesh_load_pipeline_state.gd` | Static M2 pending Resource paths, terminal statuses and finalize FIFO |
| `src/render/m2/m2_mesh_resource_cache_state.gd` | Prepared static M2 Mesh references and final-shutdown release |
| `src/render/m2/m2_mesh_resource_extractor.gd` | First-Mesh selection and temporary PackedScene instance lifetime |
| `src/render/m2/m2_mesh_resource_finalizer.gd` | Static terminal polling, Mesh preparation and cache/missing adoption |
| `src/render/m2/m2_runtime_mesh_finalizer.gd` | Runtime refresh version, rebuild classification/build and fallback |
| `src/render/m2/m2_raw_model_repository.gd` | Stateless static/animated native M2 file boundary |
| `src/render/m2/m2_native_animation_resource_observer.gd` | Native candidate/read/build/cache observation |
| `src/render/m2/m2_prototype_cache_state.gd` | Detached prototype ownership and negative lookup outcomes |
| `src/render/wmo/wmo_render_resource_finalizer.gd` | Lightweight WMO terminal polling, validation and publication |
| `src/render/wmo/wmo_scene_resource_finalizer.gd` | Cached WMO terminal polling, probe validation/lifetime and publication |
| `src/render/streaming/streaming_target_planner.gd` | Scene-free wanted/retained ADT target calculation |
| `src/render/streaming/streaming_target_policy.gd` | Immutable renderer radius/prefetch policy |
| `src/render/streaming/streaming_target_plan.gd` | Immutable planner result with read-only tile-key sets |
| `src/render/streaming/render_budget_scheduler.gd` | Scene-free per-frame operation permits and terminal cancellation |
| `src/scenes/streaming/streaming_world_loader.gd` | Current runtime orchestration, queues, caches and attachment |
| `src/domain/streaming/streaming_focus.gd` | Immutable camera-independent streaming position contract |
| `src/tools/verify_streaming_focus.gd` | Headless contract, dependency and runtime/tool wiring regression |
| `src/tools/verify_world_render_facade.gd` | Focus/environment/metrics/ground delegation, snapshot isolation and consumer wiring regression |
| `src/tools/verify_world_environment_snapshot.gd` | Cold-start environment value normalization and invalid-input regression |
| `src/tools/verify_world_entity_presentation.gd` | Entity snapshot, create/update/replace/remove and ownership regression |
| `src/tools/verify_rendered_ground_sample.gd` | Cold-start renderer ground result invariant regression |
| `src/tools/verify_terrain_quality_mesh_cache.gd` | Terrain cache admission, LRU, ownership and loader-boundary regression |
| `src/tools/verify_adt_water_load_pipeline_state.gd` | ADT water FIFO/task/thread/boundary/timing regression |
| `src/tools/verify_adt_water_scene_finalizer.gd` | Synthetic ADT water scene/ownership/boundary/timing regression |
| `src/tools/verify_m2_runtime_mesh_rebuild_classifier.gd` | M2 rebuild predicate/cache/boundary/timing regression |
| `src/tools/verify_m2_animation_load_pipeline_state.gd` | Animated M2 request/terminal/FIFO/boundary/timing regression |
| `src/tools/verify_m2_animation_resource_finalizer.gd` | Animated M2 polling/load/finalize/adoption/boundary/timing regression |
| `src/tools/verify_m2_mesh_resource_finalizer.gd` | Static M2 polling/extraction/preparation/adoption/boundary/timing regression |
| `src/tools/verify_m2_animated_scene_finalizer.gd` | Animated M2 candidate/material/player/lifetime/boundary/timing regression |
| `src/tools/verify_m2_animation_playback_controller.gd` | Animated M2 phase/selection/playback/native/boundary/timing regression |
| `src/tools/verify_m2_animated_instance_materializer.gd` | Animated M2 order/render/playback/attachment/boundary/timing regression |
| `src/tools/verify_m2_static_batch_materializer.gd` | Static M2 node/Mesh/render/attachment/boundary/timing regression |
| `src/tools/verify_m2_build_dispatch_planner.gd` | M2 dispatch priority/action/transition/boundary/timing regression |
| `src/tools/verify_m2_build_resource_snapshot.gd` | M2 observation identity/adoption/lifetime/boundary/timing regression |
| `src/tools/verify_m2_static_build_resource_observer.gd` | Static lookup/request/path/boundary/timing regression |
| `src/tools/verify_m2_cached_animation_resource_observer.gd` | Cached animation lifecycle/policy/GLB/boundary/timing regression |
| `src/tools/verify_m2_build_queue.gd` | M2 job/FIFO/progress/lifetime/boundary/timing regression |
| `src/tools/verify_m2_mesh_load_pipeline_state.gd` | Static M2 request/terminal/FIFO/boundary/timing regression |
| `src/tools/verify_m2_mesh_resource_cache_state.gd` | Static M2 Mesh cache ownership/lifetime/boundary/timing regression |
| `src/tools/verify_m2_mesh_resource_extractor.gd` | M2 direct/PackedScene/subtree order/lifetime/boundary/timing regression |
| `src/tools/verify_m2_runtime_mesh_finalizer.gd` | M2 current/stale/rebuild/fallback/boundary/timing regression |
| `src/tools/verify_m2_raw_model_repository.gd` | M2 invalid/missing/native-boundary/dependency/timing regression |
| `src/tools/verify_m2_native_animation_resource_observer.gd` | Native candidate/cache/raw/build/adoption/boundary/timing regression |
| `src/tools/verify_m2_prototype_cache_state.gd` | M2 prototype identity/negative/lifecycle/boundary/timing regression |
| `src/tools/verify_wmo_render_resource_finalizer.gd` | WMO render status/order/validation/adoption/boundary/timing regression |
| `src/tools/verify_wmo_scene_resource_finalizer.gd` | WMO scene status/order/probe/lifetime/adoption/boundary/timing regression |
| `src/tools/verify_streaming_target_planner.gd` | Planner behavior, dependency and bounded timing regression |
| `src/tools/verify_render_budget_scheduler.gd` | Scheduler bounds, shared-lane priority, cancellation and timing regression |
| `src/tools/verify_renderer_internal_access.gd` | Gameplay/EditorPlugin/registered renderer-tool boundary gate derived from private streamer fields |
| `addons/mpq_extractor/loaders/adt_builder.gd` | Terrain/material/liquid construction |
| `addons/mpq_extractor/loaders/m2_builder.gd` | Static M2 mesh/material construction |
| `addons/mpq_extractor/loaders/m2_native_animated_builder.gd` | Native animated M2 experiment |
| `addons/mpq_extractor/loaders/wmo_builder.gd` | WMO groups/doodads/liquids construction |
| `src/scenes/sky/wow_sky_controller.gd` | DBC-driven sky/light/environment |
| `src/native/src/*_loader.cpp` | Native binary parsing |
| `src/tools/build_*cache.gd`, `src/tools/bake_*cache.gd` | Offline cache generation |
| `tools/run_render_baseline.ps1` | Unified M00 baseline runner |
| `src/tools/compare_render_checkpoints.gd` | Offline JPG/PNG paired-image perceptual metrics and JSON pass/fail report |
| `src/tools/verify_render_runtime_cache_shutdown.gd` | Headless ownership regression for detached runtime prototypes, resource caches and empty liquid roots |
| `src/tools/capture_render_checkpoints.gd` | Deterministic no-roll checkpoint camera, performance and visual capture |
| `src/tools/server_spawn_render_manifest.json` | Dedicated mapped AzerothCore spawn checkpoint and diagnostic marker configuration |
| `src/tools/verify_server_spawn_renderer.gd` | Fixture-to-renderer checkpoint contract verification |
| `tools/sweep_render_checkpoint_camera_pose.ps1` | Offline yaw/pitch capture grid and paired-error ranking |
| `src/tools/verify_render_coordinate_calibration.gd` | Build 12340 camera-coordinate golden point round-trip diagnostic |
| `src/tools/probe_render_terrain_height.gd` | Offline facade-backed active-mesh terrain height and camera-clearance report |
| `src/tools/probe_render_camera_occluders.gd` | Scene-tree placement containment and camera-to-target AABB intersection report |

## Related decisions and references

- [`../../RENDER.md`](../../RENDER.md)
- [`../RENDER_BASELINE.md`](../RENDER_BASELINE.md)
- [`../CAMERA_POSE_SWEEP.md`](../CAMERA_POSE_SWEEP.md)
- [`../M00_FINAL_PAIRED_EVIDENCE.md`](../M00_FINAL_PAIRED_EVIDENCE.md)
- [`../../targets/roadmap/02-rendering-and-graphics.md`](../../targets/roadmap/02-rendering-and-graphics.md)
- [`../GODOT_BEST_PRACTICES.md`](../GODOT_BEST_PRACTICES.md)
