test(M00): add camera pose sweep

docs/CAMERA_POSE_SWEEP.md

@@ -0,0 +1,39 @@
+# Renderer Camera Pose Sweep
+
+This offline M00 diagnostic recovers reproducible checkpoint framing when an original-client screenshot has no recorded camera yaw or pitch. It ranks a bounded grid; it does not change renderer or player-camera defaults and does not prove the exact build 12340 camera pose without human approval.
+
+## Camera contract
+
+`capture_render_checkpoints.gd` accepts additive `--camera-yaw-offset` and `--camera-pitch-offset` values in degrees. Yaw rotates the no-roll checkpoint basis around Godot world `Vector3.UP`; pitch then rotates around the camera-local right axis. Zero offsets preserve the manifest target exactly. `--single-pass` captures only `cold_process` and is intended for pose calibration, not performance baselines.
+
+## Workflow
+
+```powershell
+.\tools\sweep_render_checkpoint_camera_pose.ps1 `
+  -ReferenceDirectory 'D:\private-fixtures\wow-3.3.5a-checkpoints' `
+  -Checkpoint elwynn_adt_boundary `
+  -YawOffsets -15,-10,-5,0,5,10,15 `
+  -PitchOffsets -10,-5,0,5,10 `
+  -WaitSeconds 2
+```
+
+Each candidate receives its own output directory and comparison report. `ranking.json` sorts candidates by mean perceptual error and then changed-pixel ratio. Use `-PlanOnly` to validate the Cartesian grid and output paths without rendering. Run a coarse grid first, then a finer grid around the best candidate.
+
+```mermaid
+flowchart LR
+    Y[Yaw offsets in degrees] --> G[Bounded Cartesian grid]
+    P[Pitch offsets in degrees] --> G
+    G --> C[Single-pass checkpoint captures]
+    R[Original-client reference] --> D[Perceptual comparator]
+    C --> D
+    D --> J[ranking.json]
+    J --> H[Human framing approval]
+```
+
+## Interpretation and recovery
+
+The smallest error is a candidate, not automatic fidelity approval. Geometry, materials, lighting and FOV can move the perceptual optimum away from the true original-client pose. Inspect the best images manually and retain the original reference outside Git. A missing matching reference or candidate is a hard error; correct the checkpoint filter or filenames and rerun. Generated PNG and JSON outputs are disposable local evidence.
+
+## Verification
+
+The headless capture dry-run must report requested yaw and pitch offsets. Comparator `--self-test` covers paired metrics. Sweep `-PlanOnly` covers deterministic grid expansion and output naming without requiring a display. A real ranked sweep requires a display and a private build 12340 reference image.

docs/modules/world-renderer.md

@@ -195,7 +195,7 @@ Exact exported settings and cache versions remain documented in [`../../RENDER.m
 
 ## Verification
 
-- Unit/contract tests: material mapping, unique-ID dedupe, placement probes, baseline manifest, five-point coordinate calibration, synthetic perceptual checkpoint diff.
+- Unit/contract tests: material mapping, unique-ID dedupe, placement probes, baseline manifest, five-point coordinate calibration, synthetic perceptual checkpoint diff, camera-pose grid plan.
 - Integration/E2E: Eastern Kingdoms/Kalimdor streaming scenes and seven cold/warm checkpoints.
 - Fidelity evidence: пять локальных build 12340 reference JPG откалибровали terrain/ADT/M2/WMO/liquid viewpoints; automated paired-image metrics exist, но synthetic animation/dusk и полный human approval ещё не закрыты.
 - Performance budgets: M00 report records cold/warm p95 and max hitch; no final acceptance threshold yet.
@@ -229,6 +229,7 @@ Exact exported settings and cache versions remain documented in [`../../RENDER.m
 - 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.
 - D3D12 descriptor issues remain; the capture-path anonymous `RefCounted` shutdown leak is regression-covered by a clean verbose dry-run, while other RID/resource diagnostics still require independent evidence.
 - M2/WMO/material/particle/ribbon/portal parity incomplete.
 - Public API is mostly exported configuration rather than stable contracts.
@@ -248,6 +249,7 @@ Exact exported settings and cache versions remain documented in [`../../RENDER.m
 | `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/capture_render_checkpoints.gd` | Deterministic no-roll checkpoint camera, performance and visual capture |
+| `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 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 |
@@ -256,5 +258,6 @@ Exact exported settings and cache versions remain documented in [`../../RENDER.m
 
 - [`../../RENDER.md`](../../RENDER.md)
 - [`../RENDER_BASELINE.md`](../RENDER_BASELINE.md)
+- [`../CAMERA_POSE_SWEEP.md`](../CAMERA_POSE_SWEEP.md)
 - [`../../targets/roadmap/02-rendering-and-graphics.md`](../../targets/roadmap/02-rendering-and-graphics.md)
 - [`../GODOT_BEST_PRACTICES.md`](../GODOT_BEST_PRACTICES.md)