Masking Normal Maps
I apologize if this is an amateur question, but I've had some difficulty finding tutorials that cover exactly what I'm trying to do in ShaderMap 4.
I have a normal map (Map A) that came with a 3D model that I am editing. I am trying to mix this normal map with a second normal map (Map B ) that I am hand-painting in ShaderMap 4 (Basic--I might upgrade if I can figure out how this works!). The texture that this normal map is affecting is in a toony style, with black lines and hard edges. I am trying to use masks to mask out only the area of Map B that I want to paint. However, when I paint on Map B, strokes that fall outside of the mask still show up on the preview, as well as in the final mixed map (created using Blend Normals). I have an Imgur album here that might explain what I'm describing a little better.
Any advice y'all can give is much appreciated!