- I'm a little bit confused that it works on small FPS (60) and jerks off on high one (512).
I had that problem too. I guess it's because time_step can has values between 0,1 and 10 (at least that's what the manual says). But at 512 fps time_step should have 0,031 as a var (16/512 = 0,03125) which is below 0,1. Limiting to 60 fps helped me there.
