Layering Materials Node

[interelectronix]

What is the node to use when layering materials on top of each other and the bumps should add up.

The picture attached shows a reference pcb

White screen print (with bump)
Shiny metallic soldering pads (with bump)
Small holes (opacity though through the PCB material)
PCB Material green (with bump)

[interelectronix]

Thank you very much for the composite material tip.

I'm still struggling with the bump height control and blurring the bump maps. Not having a blur node and having to do the OSL texture workaround is quite annoying.