Texture Paint Diffuse and Normal Map Over Existing Diffuse and Normal Map I am texture painting a model. This model already has a texture and a normal map assigned, but I would like to paint another texture and normal map over this existing texture and normal map.

Here is a screenshot of what I am trying to do:



Is there a way to paint both the diffuse and normal map of the new texture together over the existing maps, or do I have to do both maps individually, like I am currently doing? A problem with doing each map individually, is that it is difficult to make sure both maps are painted identically.
I used two shaders input to a mix shader (cycles) and used two UV mappings - one is set to the default all faces overlapping for the tiled texture with normal map, and the other is for a smart UV unwrap for painting the stencil.

A normal Map node is for getting the bumps from the normal, and I chose blue for the original shader so it would contrast to see the effect.

Most people imagine that software like Substance Painter is projecting both the diffuse/albedo and the normal at the same time through the brush when it is actually similar to this set up using a stencil to reveal the automatic mapping.