I have a problem about adding an image with transparent background over the already existing material in a group of faces (or a single face) of an object. I saw similar questions in the forum but none of those gave me the result that I am looking for.
As example, I have cube which has been unwrapped, and has a material with normal map, mapping, etc
Then I want to add and image with transparent background on only one of the faces to get something like this (fake image using gimp)
I tried several approaches (multiple uv mapping, using mix nodes, etc) without getting the desired result. I cannot properly combine the two images to get what I want. Which would be the best approach to get this done?
Thanks in advance