I am working on a paint for a plane that has two decals. I want to make both decals totally transparent so I can apply proper graphics to that area. I found with the main decal that if I make the alpha totally black and the decal or bmp totally white it will be fully transparent in game.
The other decal does not work that way. I tried the same technique but it turned it to chrome instead. Why does one work and not the other?
What decides if a bmp is going to be chrom or transparent?