Default

The neutral fallback surface — a plain white, non-metallic PBR material with mid roughness (0.5), sampling the built-in white texture. This is what an object renders as when no material is assigned. Built on @builtin::shaders.pbr.

Inputs

• colors.base_color — the flat tint (white by default).
• floats.roughness (0.5) / floats.metallic (0.0) — a neutral matte dielectric.
• textures.base_color_texture — the built-in default:white texture.