I was hopeing to use overlay on a model on its first texture in order to blend two or more textures together on one model. I was hoping to use this effect so the user could define a background color (the second skin, this would be dynamically made) and this would be displayed behind a more complex design with black sections in it (the first skin, hopefully with overlay on it) to let the background color in it. But I really wasn't sure how to do this effect, is this possible with overlay or another feature or do I have to go about it another way. Thanks .