In pinball fantasies under maximum cpu cycles, the pin ball shows graphical artifacts, presumably caused by double buffering in opengl and either too fast or unsynchronized screen updates. Attached is a minor code change to workaround this issue -- placing a time delay after each buffer swap. Another workaround is to lower the number of cpu cycles, but the delay may ameliorate other artifacts related to screen updates while in opengl mode, especially for the older dos games.