Ok, so I decided I wanted a nice, smooth round background for my minimap. I created the TGA, got it saved good, got it in game. One problem: it covers the map! Now, I could cut out just the right sized ring, but that would be... tricky. At least for me and my minimal photoshop skills. So I figured I could shove the texture to the back strata, right?
Well, you can change the alpha by editing the second to last line. And, uhm, I'd change the color by editing the texture file, but I'm sure there's a way to do that in script, although how is entirely lost on me.