Make sure the clothing contrasts with the background – black clothing on black background is very difficult for aim to work with. In example below, green is good clothing, red is bad clothing.
Make sure that the wrists and hands are not covered by long sleeves. The aim platform needs to see these parts of the body for good results.
Make sure that shoe height and style match the shoe height and style for your rig. For instance, if your rig is wearing high heels, make sure your performer is wearing high heels of similar height. This will ensure that the performer’s movement is naturally transferred over to your rig.