I tried to set it to Input Texture Alpha, then None, then set it again. I tried to merge all layers in Photoshop, so that the image was completely opaque. I tried to put a color layer below everything, so that no doubt the image was completely opaque. I tried to use a different scale. No way. They only way to obtain alpha from the texture is to make it transparent in Photoshop. Which I don't like, because the transparency is set to white, and it makes artifacts. I want to use MY ALPHA CHANNEL. You don't have to guess based on if there's transparency in the image or not: just put the plain option in there and if it's selected, IMPORT THE TEXTURE USING THE ALPHA CHANNEL AS TRANSPARENCY. I'll never understand why people love to make simple things complicated. Just add a menu item so that we will have: NO TRANSPARENCY TRANSPARENCY FROM IMAGE PIXELS TRANSPARENCY FROM ALPHA CHANNEL TRANSPARENCY FROM GREYSCALE.