This command will alter the material diffuse component of the object. The diffuse component makes up one of the factors that controls the final colour of the object, specifically the amount of light it receives from all available light sources. Can be used on INSTANCED OBJECTS, but if ALPHA MAPPING used, it will carry alpha in diffuse value.
Syntax:
SET OBJECT DIFFUSE Object Number, Color Value
SET OBJECT DIFFUSE Object Number, Color Value, Vertex Diffuse Mode