Final cross-cutting review of N.5 found that Task 15's deletion of
mesh_instanced.vert/.frag left InstancedMeshRenderer orphaned —
ACDREAM_USE_WB_FOUNDATION=0 silently rendered terrain+sky only with
no entities. The SHIP commit's "[x] ACDREAM_USE_WB_FOUNDATION=0 still
works" claim was inaccurate.
Resolution: formal retirement of the legacy renderer path within N.5
instead of deferring to N.6.
Deleted:
- src/AcDream.App/Rendering/InstancedMeshRenderer.cs
- src/AcDream.App/Rendering/StaticMeshRenderer.cs
- src/AcDream.App/Rendering/Wb/WbFoundationFlag.cs
GameWindow simplified — capability detection is unconditional, missing
bindless throws NotSupportedException with a clear message at startup.
WbDrawDispatcher + mesh_modern shader load are mandatory after init.
No escape hatch.
GpuWorldState simplified — WbFoundationFlag.IsEnabled guards on
AddLandblock/RemoveLandblock removed; adapter calls are unconditional
when the adapter is non-null.
PendingSpawnIntegrationTests updated — WbFoundationFlag.ForTestsOnly_ForceEnable
static ctor removed (flag is gone; adapter calls are unconditional).
The ApplyLoadedTerrain physics-data loop was also simplified: the
EnsureUploaded sub-loop that fed InstancedMeshRenderer is gone;
_pendingCellMeshes is now explicitly cleared to prevent unbounded
accumulation (the worker thread still populates it, but WB handles
EnvCell geometry through its own pipeline).
Spec §2 Decision 5 + §10 Out-of-Scope updated. Plan ship-amendment
section added. Roadmap updated (N.5 ships with retirement; N.6 scope
narrowed to perf-only). CLAUDE.md "WB integration cribs" updated.
Perf baseline doc updated. WbDrawDispatcher class summary docstring
corrected to describe the as-shipped SSBO + multi-draw-indirect path.
ISSUES.md #51 updated (terrain not in N.5 scope; deferred to N.7).
Bindless support is now a hard requirement. Modern desktop GPUs
universally expose GL_ARB_bindless_texture + GL_ARB_shader_draw_parameters;
if a user hits the NotSupportedException, that's a real bug report
worth investigating, not a silent fallback.
Build: 0 errors, 0 warnings. Tests: 71/71 (Wb+MatrixComposition+TextureCacheBindless filter).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Brainstormed 2026-05-08 over 8 design questions. Captures:
- Texture model: sampler2DArray for ALL textures (1-layer wrap for
per-instance composites). Matches WB's modern shader, future-proofs
for atlas adoption in N.6+.
- Translucency: WB's two-pass alpha-test (no native Additive on GfxObj
surfaces; falsifiable at visual verification).
- Data delivery: all-SSBO. Instances[] at binding=0, Batches[] at
binding=1. Indexed by gl_BaseInstanceARB+gl_InstanceID and
gl_DrawIDARB respectively.
- Bindless residency: resident on upload, never release. Bounded
content; instrument under ACDREAM_WB_DIAG=1.
- Escape hatch: two-way flag preserved. N.5 replaces N.4's draw method
in place; legacy InstancedMeshRenderer remains the safety net.
- Perf measurement: CPU stopwatch + GL_TIME_ELAPSED queries, logged
via [WB-DIAG]. Acceptance gates pasted into SHIP commit.
- Persistent-mapped buffers: deferred to N.6.
- Per-instance highlight (selection blink): deferred; field reserved
in InstanceData for Phase B.4 follow-up.
Spec at docs/superpowers/specs/2026-05-08-phase-n5-modern-rendering-design.md
covers architecture, components, per-frame data flow walk-through,
translucent rendering, error handling + fallback, testing + acceptance,
risks, and explicit out-of-scope list. Plan + task breakdown comes next.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
