glowing walls isnt a bad thing. like i said before, its just fungi or bugs glowing for damp walls, and i figure that even though the walls are with magma on oneside, how thin do the walls have to be before they glow? after all, i dont think there has ever been a statement as to how thick the walls are, just that they are one unit onscreen.... they could be a foot thick or a dozen feet thick, so does not the density and amount of matter have any bearing upon that?
and besides, you guys seem to be worse than the nazis by shooting this down so easily.... it is a game after all, and while it may be partially relistic in many aspects, who cares about the damn radiation when you got cave spiders eating your horses and Megabeasts destroying your constructs?
so in my opinion, screw the radiation idea and the glow of magma walls, as all these walls are are temperature influenced. not leaking magma or water. A damp wall doesnt need to be seeping water in any way. there is this thing that people notice all the time called condensation. the walls would attract the moisture and then become damp due to the collection of this moistness from the atmosphere.
if you have damp walls in a desert, would the water not be warm anyway? after all the heat would eventually transfer to the water thus making it warm or hot if it didnt evaporate, so would that not make the rooms warmer too?