I tried applying Polypaint before I create the IMM Brush/Object, But when I try to use the IMM Object Brush it does not apply the Polypaint. You mean applying the Polypaint before 'create InsertMesh'?
I have read that part of the manual before, and tried to turn off Polypaint. But I can't seem to get it to work. I apply Polypaint to the model, create an InsertMesh Brush, Turn off Polypait for the object where I insert the IMM Mesh/Brush. And there is no Polypaint on the inserted mesh.
Sorry, :-/ I forgot to turn Polypaint back on after I inserted the objects (I turned it off before adding the IMM mesh, but forgot to turn it back on). I have not used Polypaint much. Thanks again!
IMM does not support UVs if I recall correctly. Due to how it's basically creating a new mesh with a different vertex order every time you use it. It can however, support polypaint. Depending on what you're doing, perhaps you could paint your mask with polypaint instead, and use mask by intensity.