A material ID is a sub-object polygonal material selection. It is generally used to apply more than 1 material to an object without breaking it up into multiple objects.
What is a Material ID in 3ds Max? Every now and then I am prompted with a window asking if I want to match the material with the material ID when attaching objects. I have read the manual but I still don't understand. The term comes up quite a bit making me feel it has importance...