[mkl]

Is this generating each frame from scratch, or are they aware of the frame before?

With the genetic drawing method linked, you could start with the current frame, and add brush strokes to the regions that are different to make it more like the next frame. That way things that aren't changing would stay still and not flicker.

[rlp]

Yes, it's aware of the previous frame. I believe I used some kind of motion "heat map" that would indicate where the changes were needed based on accumulated deltas that would gradually decay. However, I still had to keep the brush strokes on a reasonably regular-ish grid to get enough paint brush coverage for real-time rendering. Also, if they were too randomly placed, the image jumped around too much.