The most bang-for-the-buck feature of PIDs I've seen yet is to smooth out game camera movement so that the camera feels less 'mechanical' (works both for the 3r

The most bang-for-the-buck feature of PIDs I've seen yet is to smooth out game camera movement so that the camera feels less 'mechanical' (works both for the 3rd-person camera behind a character, or the overhead camera in a strategy game which needs to jump between positions). Just implement the camera positioning and lookat-pointing in the dumbest way possible (including non-continuous, sudden jumps), plug a PID into the position and look-at point, tweak the parameters a bit and voilà, pure magic :)