Maya Training

Introduction to Hard Surface Modeling

Maya Training

Interiors and Furniture Vol 1 & 2 - Modeling & Cloth

Maya Training

Shading, Lighting and Rendering the Bedroom in MR

Maya Training

Robot volume one - Modeling with animation in mind

Maya Training

Spach-Alspaugh House the complete courseware

Maya Training

Burt The Cartoon Dinosaur Vol 01 - Modeling

New Maya Training

Robot Volume 02 - Hybrid Rigging
You are here > Home > SimplyMaya Community Forums
Loading

Welcome to Simply Maya

Please Sign in or Sign up for an account

Member Login

Lost your password?

Not a member yet? Sign Up!

Old 26-04-2006, 05:03 AM   #1
parka
Registered User
 
parka's Avatar
 
Join Date: Aug 2005
Posts: 102
Thanks: 0
Thanked 4 Times in 4 Posts
Default Strange deformation

(I hope I post in the correct category)

Problem: When I bend the joints and do a paint weight, the faces will move in ways I don't expect. Painting with a Zero value doesn't move them back to the original position, but somewhere else (as in figure). How can I fix this?

Problem #2: Althought I have only 1 joint named left_joint_toe1 inside outliner, there are 2 joints of the same name in the Paint Weights dialogue box. How do I delete the duplicate?

Tried: I've tried restarted the application. I've tried deleting history for all types.

Thanks in advance.
Maya version 7, Windows XP.

parka is offline   Reply With Quote
Old 26-04-2006, 02:05 PM   #2
Velusion
Registered User
 
Velusion's Avatar
 
Join Date: May 2004
Location: Utah, USA
Posts: 368
Thanks: 0
Thanked 0 Times in 0 Posts
Default

The strange deformation is because those vertices are weighted to other bones. I guarantee it. Click on each bone and look at the model. The one that is causing the trouble will show weight (white) across the faces. If you don't see any white on those faces no matter which bone you choose then it means that 2 or more bones have weight on that area and each has such a small amount of weight that it doesn't show up as white but it is still there. You can choose each bone and either paint zero weight across the faces or you can just choose each bone and flood the model with zero.

The thing about skin weights is that each weight (the weight on each vertices) has to always equal 1. This means that the weight is normalized. If you paint some weight on an area, the weight is being taken away from one of the other bones that is weighting that area so that the weight always equals 1. Example : Vertices 1 is being weighted by bone 1, bone 2 and bone 3. bone 1 has .25 weight, bone 2 has .5 weight, bone 3 has .25 weight. All together these 3 bones have weight that equals 1.

When working with weights, it is best to "hold" the bones that you don't want to disturb. That way, when you paint the weights, Maya won't take any weight away from the bones that are on "hold" and if you subtract weight from a bone, Maya won't add the weight to a bone that is on "hold". I like to put all bones on hold then selectively unhold the ones I'm working with at the moment. It can be tricky and it takes some practice but you can do it!

About your naming problem. The picture you added is hard to read but, the two bones that appear to be named the same might have a small difference such as a capital letter. Check that out. ... Maya should not allow 2 bones with the same name unless there is some kind of a difference. Maybe each of the 2 bones is in a different group or maybe you changed the name of one of the bones and the old name is still part of the bone's history. Look in your outliner and find the 2 bones then rename one of them to see what happens. Maybe you need to unbind your model then bind it again to see if the problem goes away. Could you have possibly bound the same bone more than once? I don't know if this is possible but you can check.
__________________
James Rogers
www.morphicmotion.com

Last edited by Velusion : 26-04-2006 at 02:08 PM.
Velusion is offline   Reply With Quote
Old 26-04-2006, 06:43 PM   #3
parka
Registered User
 
parka's Avatar
 
Join Date: Aug 2005
Posts: 102
Thanks: 0
Thanked 4 Times in 4 Posts
Default

Really appreciate your reply.

parka is offline   Reply With Quote
Old 14-05-2006, 08:19 AM   #4
varley
Registered User
 
varley's Avatar
 
Join Date: Oct 2005
Posts: 112
Thanks: 0
Thanked 2 Times in 2 Posts
Default

hi there, I hope your problem was solved.

If your trying to fix the problem still ( like the previous poster said, all the vertices wieght average to 1).....what you can do if still having issues is, first, make sure that toggle hold weights is off for EVERY bone....than select the pelvic bone maybe, and paint a weight of one over the verts that are having the issue.

-Also, after weighting verts to joints...move the joint around a bit to make sure its not pulling verts in other areas (like the foot pulling verts on the neck)....just to be sure paint zero everywhere else (doesnt take long if you increase the brush size)....than toggle hold weights on the joint...than move to the next.

hope that helps
varley is offline   Reply With Quote
Reply


Similar Threads
Thread Thread Starter Forum Replies Last Post
Strange Problem - Unable to change attributes for multiple objects anthonysw3 Technical Issues 4 04-12-2010 11:56 PM

Thread Tools





A little bit about who we are
Links you might find useful
Catch up with SimplyMaya
SimplyMaya specialises in Maya tutorials. We offer over 1,000 individual Maya training videos, ranging from basic Maya tutorials through to intermediate Maya tutorials. Our tutorials are created by instructors with industry experience and are designed to get you up and running in Maya quickly without making it seem like hard work.

Copyright © 1999-2015 SimplyMaya - vBulletin® Copyright © 2000-2015, Jelsoft Enterprises Ltd.