If the movie does not react to keyboard input, click once inside of it to give it focus.
There are a lot of optimization opportunities, though the frame rate seems to be pretty stable. Smoothing the terrain could be next, depth sorting is obviuosly not the best. Well, that’s what weekends are for, right?
Source? Sure: ZIP (13.9 KB)
Please tell me in the comments if it works for you and if you experience any lags.