I have read an article about texture splatting that says:
Because the alphamap only has to be in a single channel of a texture, we can pack up to four alphamaps into a single texture – one in red, one in green, one in blue, and one in alpha.
But it does not mention a way to this. Can anyone tell me or point me to an article on how to do this? I've been googling it the whole afternoon but can't find any. Or maybe I just don't know the correct terms to search. :?