I keep hearing people say this but I have never seen official documentation about this:
Will RBG textures automatically store to RGBA? If so I would like to make sure I store useful information in all my alpha channels instead of the gpu filling in 1’s.
It sounds insane to me that you would take that much more memory when not needed. I keep hearing it helps with cache lines, but because you are adding more memory it means that there is more memory to cache. (not an cpu designer but that is my initial thought).