The method of capturing optical data can create the following distinct problems:
Each problem can be corrected using either the proprietary software in the capture system or MotionBuilder.
Mostly, optical data is stored in a motion library and the data is already cleaned and fixed by the motion library vendor. If this is the case, you do not have to correct the optical data yourself and it is ready for Character mapping.
Whether you are capturing optical data yourself or using raw, uncorrected optical data files, it helps to understand occlusion, partial occlusion, and swapping. Separate topics describe each of these problems in more detail.