Layered Material : What is it exactly

Yeah as Martin says, it is no more and no less like in real life. When you have a cement wall and you paint it over with white paint, then two years later you paint it blue even though your wife wanted pink, that’s a layered material that you try to emulate in Blender with the shaders. When Tony Stark has his Iron Man suit all in metal and he paints is with hot rod red, he is layering a paint coat on top of the metal. So yeah, same as in real life, no tricks or math. 

Hi Chris @unbo ,

You are probably over-thinking this and without a timestamp, I don’t know what is meant  exactly, but for instance a car has paint (color) and on top of that a clear coat for protection and maybe also to make it look nice and shiny (or not) and possibly some wax or other finish on top of that. I don’t know much about cars, but you get the idea.

Or think of make-up on a face. It will look different on different skin, or on wood….

Or just skin itself (with its underlying fat, muscles, veins…).