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Hi all, Anyone have any pointers on working with a chroma-keyed green treadmill on a greenscreen? I've got a shoot coming up of a full body action shot of a person walking over 8 seconds while the camera dollies around in a semi-circle about 120-degrees. I need to build a virtual set around the actor (no problem), but I will need to keep the feet from doing the moonwalk and slipping all over the place. I have tracking markers set up on the greenscreen walls , but the issue I'm struggling with is how to track the exact speed the actor is walking and keep their feet on the CG ground from sliding. I have thought about putting little tracker marks on the treadmill belt, but that's about all I can think of to help keep the feet glued to the ground. Any other ideas?