Ideea for the next horror game

[membrain]

optical noise in dark areas (you might know it from gothic 3 community patch 1.74)

What is a optical noise? (Just played G3 demo...hated it, G1/G2 over all ;D)

Didn't know how to call it in English. By "optical noise" I mean what you can see, when you take a photograph with a digital camera in the dark. You'll never get pitch black, there will always be some "noise", some "flickering", let's say, very dark but colored pixels changing color.
As example from Gothic 3:
http://img.7pics.info/g3_noise_01_cp174_02_c60.jpg

membrain