Compound materials combine two or more sub-materials. Compound materials are similar to , but they exist at the material level. Applying a compound material to an object creates a compound effect that often uses mapping. You load or create compound materials using the Material/Map Browser.
The Blend material lets you mix two materials on a single side of the surface. Blend has an animatable Mix Amount parameter that lets you draw material function curves to control the way that the two materials are blended over time.
The Morpher material works hand-in-hand with the Morpher modifier. You can use it to make the cheeks of a character blush, or to wrinkle a character's forehead when the eyebrows are raised. With the Morpher modifier's channel spinners, you can blend materials the same way you morph the geometry.
The Multi/Sub-Object material lets you assign different materials at the sub-object level of your geometry. You create a multi-material, assign it to an object, and then use the to select faces and choose which of the sub-materials in the multi-material are assigned to the selected faces.
Shellac material mixes two materials by superimposing one over the other. Colors in the superimposed material, called the "shellac" material, are added to colors in the base material. A Shellac Color Blend parameter controls the amount of color mixing.