I have a boned object...call it a plank. It has about 15 bones allowing it to be bent at various stages of its length.
When I bring this object into iClone (via 3DXChange), I am able to access the bones, as expected, to bend the plank.

The issue that I am having is that when I create a couple of boxes in iClone (later to become dummy boxes) and attach them to the bones on either end of the plank, bending the plank causes the boxes to move in the opposite direction than I would expected. I would expect the boxes to move with the bone but that is not what I am getting, they move in the opposite direction. See video for actual results.



Any ideas why I am getting this result? The weight paint on the plank is very simple with each bone contributing to only its section of the plank. It was generated by Blender using the Automatic Weight maps. The weight maps see to work since you can see the plank bending correctly. To attach the boxes, I use the iClone ATTACH option, specifying the bone (as opposed to the object).



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