Hi.

Yes, its a great idea to put your own tracking markers in the shot. Try to make them as small and as highly contrasted against the background as possible. I like crosses, as they give you multiple points that you can track on one marker.

Tracking markers have to be painted out of the shot. This is done by the roto/prep 2D team at work. I'm not entirely sure how they do it as I'm not a 2D person, but I think they clone them out using Shake, reusing other parts of the image (or a clean plate) to block out where the markers were. You could eaisly remove them in photoshop, as long as you don't go crazy with them!

LisaG