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RoughnessMap

SurfaceAppearance

Content

This property determines the apparent roughness across the surface. A roughness map is a grayscale image where black pixels correspond to a maximally smooth surface, and white pixels correspond to a maximally rough surface.

Roughness refers to how much variation the surface has on a very small scale. Reflections on smooth surfaces are sharp and concentrated. Reflections on rough surfaces are more blurry and dispersed.