View Full Version : 3dsmax - moving child joint affects parent?

10 October 2008, 06:53 PM
hey everyone, i'm having a bit of a strange problem here, and being new to max i'm wondering if someone can help me out here...

i'm setting up a facial rig and i'm having a problem where moving joints seems to be affecting the parents of the joints. specifically this is happening on the lower mouth joints which are children of the jaw joint. i attached a screenshot of my heirarchy..

what i'm expecting is that when i move the children, they move independently of the parent, but what is happening now is i move one of the lip joints, and the jaw joint moves along with the lip, so the whole mouth is moving when i just want to move 1 part of the lip. anyone more familiar with max have any ideas as to how i can get this to react the way i want?


10 October 2008, 07:38 PM
This is a property of bones in Max, it is so the parent will always look at the child and you don't have to re-orient them as you do in Maya. if you don't want this to happen then open bone tools and turn off the bone property and it will not affect the parent bones rotation. Another solution is to place another object in the hierarchy like a point helper that doesn't have the bone property turned on for it. Note that any object in Max can be used like a bone, even a camera, and that any hierarchy of objects can have IK applied to them.

You might want to have a look at my DVD series to get a better idea of what can be done.

10 October 2008, 07:56 PM
ahh there we go, that's exactly what was i was looking for.

i knew i could do it with helpers and/or constraints, it just seemed overly complicated for something that i thought should be a basic function of the joint... thanks for the help!

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10 October 2008, 07:56 PM
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