Difficult to put a definite time to it. Generally just a few minutes, much the same as a detailed render. Well within the bounds of patience. In fact if I don't see the progress bar move at a reasonable speed I'll stop it because I know that there is something in the cloth/figure/animation set up that should be adjusted or corrected. It is a high resource task and will require a machine that is up to the required spec. I find that it works very well.