
2 buffers -> 2 grayscales:
3 buffers -> 6 grayscales:
4 buffers -> 13 grayscales:
Image test with 4 buffers:
Sorry, I don't have time to explain how it works now. And this is actually not that awesome, there is still much flicker with 3 or 4 buffers. But 2 buffers give really good results, there is almost no flicker at all.

My exams will be over in a week, then I'll have time to work again on my old projects.
