OptionalcolorColour of the sheen; black turns it off
OptionalroughnessRoughness of the sheen, from 0 to 1
OptionalroughnessRoughness map, read from alpha; used only when there is no texture
The two share a slot, so its colour channels tint the sheen too: keep them white.
OptionaltextureColour in RGB and roughness in alpha, the packed image; used over roughnessTexture when both
are given
Options for a Material3D's
sheengroup (KHR_materials_sheen): the soft glow at grazing angles on velvet, satin and other clothExample