Hmm, well, this is the essence of my issue here. The goo pool's mud in the first picture uses GSMuckCliff02.BGSM, but so does the terrain. They use the same BGSM, yet, the goo pool mud glows and the terrain mud doesn't. I also tried to make the terrain glow by setting its material file to the goo of the goo pool (as opposed to its mud), since the goo itself uses a BGEM instead of a BGSM. That didn't work either :/ It's like, the one and only obvious way to make this work, isn't working. Maybe Bethesda made it so LandTextures can't glow, or just never added it cause it was unnecessary for their purposes.