I have a layer A (an asphalt road) and a layer B ( leaves/rubbish debris layer with masking alpha) that i wish to stack/combine onto it. I would do it in photoshop in this manner, layer A as base layer> layer B (with some area masked out)> flatten and export the final map. But, i'm looking for a way that i can do this using graph node networking by combining the shaders and output to the shading group without having to go to photoshop.
I seen some other ways of doing it in houdini to arnold using mixRGBA plug it in and the output to the final displacement shading. But i cant find a mixRGBA node in MTOA.