I'm using Gimp because photoshop is too expensive. I was making a map for the game Zero-K and I need to add an image as a channel to use the texture, but I couldn't find a way to do this. There are no resources I could find on this.
I tried dragging and dropping an image into the channels tab
I went through every drop down menu item
I thought that maybe decomposing it might do something
I basically need a way to turn an image into a texture