- Fix inaccuracies in terrain culling raycast - Fix terrain culling issues around terrain holes - Add generic SIMD vector types `float8x3` and `int8x3` for terrain culling and future use - Make the first culling layer (LOD/Distance) respect the instance occupation mask - Add `terrain.debug` command to visualise how the culling system sees the terrain height map - Fine tune `tc_max_iterations` to 512