If that doesn't work, you'll have to decompile the map to vmf (I recommend bspsrc), then again to bsp, and then fix it with vrad. Both vbsp and vrad are on the bin folder of sfm, just drop the map in them, a console will appear and it'll start fixing your map. When you've finished all this process, just drop it into a map folder inside sfm and you'll have a repaired map!

Try typing mat_fullbright 0 in the console (sfm) and move the camera around

still thinking on a base idea, i've got too many scrapped projects

Does anyne have the Glowfx script? I tried downloading it, but the original dropbox is currently unavailable. Please tell me if you have it!

the file isn't in dropbox anymore...