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Weights and Tracking
You must exercise some care that the weights of one bone don't overlap all the way to the center of an adjacent bone, since presumably you will be doing some tracking (image-based or hybrid) at the center of that bone. If the weights overlap all the way to the center, the bone never controls its own destiny completely, and the mesh underneath its center will slide due to the adjacent bone. If you've got a tracker at one location saying the mesh assigned to it should be at that tracker's location, but the tracker on the adjacent object is pulling to a different location and has influence, the mesh will slide out from under the first tracker's location. That's OK technically, but probably not what you want.
Warning : Only facets where all three vertices are weighted 100% can be utilized for image-based tracking. Creating extended blending zones can result in there being insufficient trackable area.
If you're using image-based tracking, not hybrid tracking with supervised trackers, be aware that image-based tracking can take place only using portions of the mesh where all three vertices are at 100% weight for a specific object. If you have closely spaced objects and gradients between each, likely there will be few to no vertices available for image-based tracking. Image-based tracking requires fairly large 100% areas to track. In close quarters, you'll need to create supervised trackers for hybrid tracking.
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