I wanted to see if fast moving object, such as a yo-yo, can be tracked accurately by either After Effects or Mocha motion tracking. Not even close! They both failed after a couple of frames, so I had to track it frame-by-frame, which is tedious. Mocha, especially, was disappointing. I don’t know enough about the program at this time, but it seems to track patches of data much better than a point. Anyway, after tracking the yo-yo, I attached an AF point light to is and had it emit particles for an interesting effects. I wanted it to displace smoke, but it took too many particles (around 1/2 million), and it kept crashing AE.