> As for your eyes, I am pretty sure that they have grain And lots of it, actually. Just close your eyes or look at any non-textured surface. Tons of noise. T

> As for your eyes, I am pretty sure that they have grain And lots of it, actually. Just close your eyes or look at any non-textured surface. Tons of noise. The decreasing signal-to-noise ratio is also highly noticeable when it gets darker.