Alright, so I've already searched the forums and followed the tutorials placed, like Sameth's and Ruby's post on someone's thread, but I still can't figure out how to do it. I've made two masks, both derived from the same original one. And it still creates a glow when loading the terrains. I'm using GIMP, and I have tried both leaving the non-terrain areas black and transparent. Any pointers or more in depth directions would be greatly appreciated.
I also apologize in advance for this being the second help thread I've posted in the past thirty minutes and not placing them in one.