ok, thank you for replying. i understand its not commerically viable cause of GPU etc. but i would like to learn how, is it something which can only be done with c code scripting or can it be done with a SD substance?
I use Substance Designer and Unity5. I am not sure if this could be set up in Substance Designer as a Substance and exported to Unity. I need a material which could allow multiple materials/textures maps stacked ontop of each other, with each one using a different UV set. currently you can only add a 'secondary map' with…