3 commits

Author	SHA1	Message	Date
Samuel Bouchet	3d0c4f2f80	Phase 4.2+7: grass blade rework + soft RT shadows + toping BLAS optimization ... Grass blades: - Leaf-shaped profile (4 sections: base→belly→taper→tip) instead of spiky triangles - Wider blades (base 0.055-0.095), more spacing between blades (±0.07 scatter) - Natural green texture (50,140,35 → 80,180,55) instead of neon lime - Reduced warm shift and removed artificial saturation boost - Side faces at 60% brightness (dark green) instead of 38% (near-black) Soft RT shadows: - 2 jittered shadow rays per pixel with IGN+Cranley-Patterson temporal variation - 2.3° cone around sun direction for soft penumbra - Gradual shadow factor (0-100%) instead of binary on/off Performance: - Toping BLAS removed from TLAS (23M+ tris caused massive ray traversal slowdown) - Toping BLAS position/index buffer construction skipped entirely - Shadow rays reduced from 4 to 2 (temporal accumulation compensates)	2026-03-29 19:46:25 +02:00
Samuel Bouchet	9086a794a8	Add wind to grass toping	2026-03-26 18:58:19 +01:00
Samuel Bouchet	bc29a02c35	Phase 4.2: GPU toping rendering pipeline + winding/lighting fixes ... Add instanced rendering for toping bevels: dedicated shaders (voxelTopingVS/PS), PSO, GPU buffers (t4 vertices, t5 instances), per-group DrawInstanced in a separate render pass with LoadOp::LOAD. Fix inverted face winding (emitTri auto-winding condition flipped for CW front-facing), slope normals (use inward direction not outward), and PS lighting (negate sunDirection like voxelPS). Update CLAUDE.md with Phase 4.1/4.2 documentation.	2026-03-26 17:47:08 +01:00