THREE.JS / GEOMETRY CONTRACT

Shoot geometry onto geometry.

The official decal splatter study raycasts a mesh, transforms its face normal, and clips a transparent DecalGeometry against the hit surface. This lab keeps that projection, material policy, and ownership boundary visible with a deterministic local specimen.

decal palette minimum scale maximum scale rotate decals

ReadyWEBGL2 / DECAL

Waiting for the local specimen.

palette: —
projected: —
scale range: —
surface hit: —
sample avg / p95: —

The official Lee Perry Smith GLB and decal diffuse/normal maps, random splat colors/scales, GUI/Stats presentation, exact page/pixel composition, native WebGPU parity, device-wide performance, context-loss stress, and whole-example fidelity remain separate boundaries.

Sources: DecalGeometry · official decal splatter example