I was making a map (for Alien Swarm - their forums are dead), compiling "Fast" vrad, "Normal "vbsp" and "Normal" vvis in "Normal mode", and all the bsp was coming out black. The props were lit though. Couldn't figure it out for the life of me. Finally, I ran the compile through Interloper's compile checker and it said that apparently vbsp, vvis and vrad weren't included in the map compile. I double-checked - and yes, they were. So I compiled "Fast" vrad (Normal vbps, Normal vvis) in "Expert Mode"... and the map came out fine. That was very weird. Does anyone else have an issue with compiling in "Normal mode"?