Pitch Black view models

[TheSuperDaine]

I'm making a vent with the same 96x96 size as the one in turbine, but the one in turbine (as well as mine) makes your view model (almost) pitch black. The amount of light or position of lights or even the density of all the lights don't seem to affect this problem. The view models turn bright again if I'm crouching, or looking straight up. I was wondering if there was some way to fix this.