ReadonlygeometryHighest-detail indexed triangle geometry.
Optional ReadonlylodsOptional coarse levels ordered from smallest to largest projected-radius threshold.
ReadonlymaterialOpaque or alpha-masked built-in metallic/roughness PBR material evaluated by the shared surface/BRDF contract. Base-color, opacity, metallic, roughness, combined metallic-roughness, occlusion, emission, and normal maps support UV0/UV1 and material UV matrices. Layered extensions, custom compilation, parallax/environment inputs, blending, alpha-to-coverage, and non-default depth modes fail closed.
One material/geometry family consumed by the GPU Scene fixed-bucket indirect path.