Thank you so much, sorry for late reply (been busy) and not getting this correctly right away. I just have one question though, for the opacity, I don’t think I isolated the UVs correctly because it looks like this or I’m not using the correct shading model? (Sorry for crappy textures, I’m just testing).
I’ll keep in mind of the limitations with complex geometry. It works for the post processing outline though.
I made another post for the rim erosion/outline like you suggested and I’ll link your answer from here to there as well because you found the solution but we talked in this thread.