I love 3D dice, but I run with them off because rolls take 2-5 seconds longer with it enabled. Perhaps a slider that controls the total time it takes for the simulation to process? So if I wanted a 500 ms roll, I could force the simulation to display the dice total quicker. The suspense can be fun, but when you're pressed for time or otherwise in a hurry a 5 second roll isn't a luxury we can afford.