skPigmentSet (shader module)

Reads the scene's pigment set (sk_pigments) in a styleKit block: the set's pigments with their granulation, its shadow pigment, light tint and air colour, and skg_remix, which re-mixes any colour from the set's pigments at the colour's own value. Include it after skCommon and skPigment in a block that lists pigments under reads and declares sk_pigments (a texture) after the shared header.