As in, putting a specular map in a diffuse texture's alpha channel.
I have no idea how to do this. I am using Gimp and am really happy with it especially considering the price.
There has got to be a way to do this in gimp right?
The idea of storing a whole map in a single channel is foreign to me. (Heck, channels are barely less foreign) Any time I do a search on it, it comes up with a lot of unrelated hits, or sites that assume a higher degree of intelligence than I currently possess. Can someone link a tutorial or tell me a keyword that will get me headed in the right direction?
Part 2: At what point does it become 'cheaper' to stack more information into a single image file, as opposed to separate simpler image files, which I would guess draws more strain on the processer?
I.E. Putting something in an alpha channel and then in the material passing that image through several opperators before it gets plugged in to, say the specular.
Having a separate specular image that plugs directly into the specular field of the material. Which would likely cost more memory.