I'd like to take a look at that thread if you can find it, hopefully it's still floating around somewhere on the boards lol

I have a building that sits on my terrain, and it has a few lights inside of it that intersect with it's geometry but I tried placing one that intersected with the skybox as you mentioned and that didn't seem to help.

Perhaps it is because of the shader that IceX2 uses?

Thanks a lot for your help,