emil28092005 ed919edb0a fix: enable back-face culling — removes self-shadowing artifacts ...

Root cause: CULL_MODE_NONE in both main and shadow pipelines caused
back faces to render, creating self-shadowing acne on all objects:
- Shadow map: back faces written at closer depth → false shadows on front
- Main render: back faces visible through objects → wrong lighting

Fix:
- Main pipeline: CULL_MODE_BACK (was None) — only front faces render
- Shadow pipeline: CULL_MODE_BACK (was None) — only front faces cast shadows
- Removed normal flip hack (if dot(N,V) < 0 N = -N) — no longer needed
  with proper culling + correct CCW winding in cube.obj
- This is the standard approach: correct geometry + back-face culling

2026-06-18 22:00:03 +03:00

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