TerrainExtension binds the shared torch depth array, comparison sampler and table
(91/92/93); terrain.wgsl re-evaluates the vertex-picked exterior point entries per
fragment with the cube-map shadow at night (sampled 0.15 yd along the terrain normal),
blended by 1 - sun strength only inside a night branch so daylight is bit-identical.
interiorDebug 2 paints the terrain torch factor. Whole-file naga probe for terrain.wgsl.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
