Light travels beneath the surface.

The official example injects a scattering response into Blinn–Phong lighting using SubsurfaceScatteringShader, an albedo map, and a thickness map. This local contract keeps that shader/material topology visible with deterministic textures and three comparison specimens.

This is a deterministic shader/material contract, not the official FBX bunny, JPEG maps, Stats/lil-gui presentation, or pixel composition. External asset loading, exact page fidelity, device performance, backend parity, context-loss stress, and whole-example fidelity remain separate boundaries.

Sources: official subsurface-scattering example · shader module docs