I am thinking of the possibility of a hand rig and hand capture. Instead of clothing one would ware a glove (White?) with each finger segment change by a sharpie marker.

The cameras would be around a table and capture would be putting their hand straight down between them.

To start with the T position would have their hand pressed on a piece of paper then mark each finger tip of the paper and of course the paper should be tape to the surface so it doesn't move.

Next would be the camera calibration. Same as full scale with a mag light but now using the paper as the ground: moving, circling and hitting each mark.

Once the calibration is done. The actors hand would start by placing their fingers in the same spot then moving them for the hand capture.

The hand capture would use 'Analyze Actor' on the glove and then track the moments now having a hand rig instead of a biped rig.

Also there would might be a need for some sort of mini wall so the cameras are not picking up body movements in the back ground.

Dale