whiteCard

A lit PBR diffuse-white reference card: a rough (0.6), non-metallic dielectric with linear albedo 0.9, about the brightest physically plausible diffuse surface (fresh snow, white paper). Under a correctly exposed key it should sit just below clipping while the 18% grey card reads as middle grey; if it blows out, the exposure or the light is too hot. Drawn by @builtin::shaders.pbr, no textures. Part of the materialLibraryKit calibration shelf.