Penumbra White Screen Problem?

[TacitusUmbraSicarius]

I think Blur is causing this as far as I recall

I don't know but now I can see!!! This game is scary as hell...

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Another thing that's off of this topic, what does Penumbra mean? Umbra is Shadow in Latin (my name means Silent Shadow Assassin in Latin), so does Penumbra mean something shadow? Also, about Amneisa, that game was originally called Lux Tenebras and tenebras is similar to tenebrae in Latin which means: darkness, night, unconsciousness, death, blindness, dungeon, haunt, the lower world, ignorance, and obscurity (which makes complete and perfect sense!!!). Sorry if these are stupid questions, I just wanted to know...