Facial Rigging Problem

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  07 July 2013
Facial Rigging Problem

I am trying to paint weights on my character's face, but when I try to paint weights on the displaced parts of the character's face it doesn't seem to affect the displaced vertices. Does anyone know how to solve this problem?
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File Type: jpg Facial Rigging Problem.jpg (39.4 KB, 26 views)
  07 July 2013
You mean displaced vertices as "displacement map" displaced? Those vertices exist only in render time not in your viewport for skin modifier to catch them... Solutions? Well maybe something like this http://vimeo.com/21317049.... these guys are using correction shapes, or correction targets in Max world.... who are converted in displacement maps... i.e. as a final result you get animated displacement maps... as far as I know... maybe I'm wrong, there is no similar solution for Max ... except if you are a very good programer and can make similar plug-in for Max...
Second solution is to ditch displacement maps or use them in very small amount, make your model a higher resolution one, make a really good facial topology, really good layout of stretchy bones for your bone-based facial rig, and carefully skin them...
Bottom line: there is no fast and easy solution for a good facial rig...
  07 July 2013
No, as you can see in the render image I have attached the face geometry becomes all messed up when moving the jaw bone. And when I try to paint weights onto those affected vertices they wont jump back to the original positions on the model for some reason.
  07 July 2013
What kind of a facial rig are you using? Bone based? Bone/morph? Morph only? Try to turn "on" "show all weights" in skin modifier... if you are in Max, in that way you can see what vertices are affected by what bone.I cant tell you much more without seeing your facial rig...
  07 July 2013
I am using a bone based facial rig in Maya 2012.
  07 July 2013

I'm not too familiar with weight painting in Maya, but in 3ds Max all the weighting values of an individual vertex have to sum to 1, this means if a vertex on the jaw is fully weighted to the jaw bone and has no other influences, you won't be able to subtract weighting values from the vertex because only the jaw bone is influencing it and then its values won't sum to 1, what you would do is to select another bone close by and add some influence from that bone to the vertex. So for example you could have a vertex which has 0.75 influence from the jaw and 0.25 from the lower lip.

  07 July 2013
Hi, when you are in the paint weight tool window, do you have it set under POST?

If so, then the verts have more than 1 joint influencing them.

At this point, flood the whole mesh with 1 joint, like the head joint. Then go through and remove all the other weights on each joint. Then start painting with each joint, and remove the influence from the head(in the correct areas).

Again this is if you are painting in post.

  07 July 2013
No, I have it set under interactive.
  07 July 2013
Really? If you can post up the file we can look at it better.
  08 August 2013
I can't post the Maya scene file on here because the file does not have a valid attachment extension for this website.
  08 August 2013
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