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"character skinning made easy" ngSkinTools is a skinning plugin for Autodesk Maya, introducing new concepts to character skinning such as layers, any-pose-mirroring, enhanced paint brushes, true smoothing, and more. LAYERS Skinning layers are a central feature of ngSkinTools. With them, you break your rig down into easier manageable parts and edit them separately, then blend everything together through layer transparency. They're not just a simple way to make your work more organized - they also physically isolate groups of influences from the rest of the rig, so paint and edit operations won't mix-in influences you were not expecting. This also allows you do things that were impossible before: per-layer mirroring, adjusting influence weight up/down through layer transparency, blend transfered weights with previous weights, to name a few. MIRRORING You won't be needing to go to T-pose again when going through paint+mirror cycle, you can mirror in any pose now. There's also a much greater control over what influences mirror onto which one: associating left-right influences by name without prefix, manual association overrides, etc. Mirroring is also layer-friendly, so you can mirror just the parts of your model you're currently working on - very helpful, when you want to keep other parts of your rig intact. PAINTING ngSkinTools has it's own set of paint tools, which are capable of working on a per-layer basis. Each tool maintains it's own intensity, which is handy when toggling between smooth and replace through shift-modifier. Smooth is completely redesigned and you're going to just love it:) smoothing The new smooth brush gives much better results, as it operates on all influences of a vertex at once. For even greater control, the more precise "relax weights" tool is there, which also can smooth across mesh boundaries and thin meshes. COMPATIBILITY ngSkinTools operate on standard maya's skinCluster (also known as "smooth skin"), so no custom nodes will be req

This is a custom Maya brush which makes smoothing skin weights very fast and easy to do. Because it smooths all influences at once there is not the typical normalization problem which the standard Maya smooth skin brush has (normalize = interactive). When normalization is on post, the result gets not smooth immediatley, so you would have to switch between all influences to get it really smooth. With tf_smoothSkinWeight.py you get in both situations a smooth and correct result immediately. Benefits: - smooth weights with a few strokes - saves a lot of time - weights all joints at once - no need to worry about normalization - creates a really nice and smooth weight-transition

thanks Brad for the link!

Animation Tools - a set of free Maya-tools targeted at reducing the amount of tedious work associated with the setup process of high quality, animatable characters. The Adaptable Facial Setup is capable of driving any humanoid geometry, drawing from an extensive, FACS-based library of facial movement components. The process of fitting the head skeleton to the individual geometry is simplified by offering a standard set of skin weights that accommodates the typical deformation regions of the face. Any skin weights may be cloned topology-independent from one head to another utilizing the Geometry Matching Tool. The Corrective Blendshape Manager offers a useful way to add subtle deformations to a skinned mesh. Blendshape targets can be created and edited, and are computed with respect to the bind pose of the skinned mesh.

a bit rigging off-topic but hey... :) thanks to Gabriele for the link.

The Disney paper and video on "Efficient elasticity for character skinning with contact and collisions" is definitely worth a look. http://pages.cs.wisc.edu/~sifakis/projects.html

CG Papers and Abstracts Dealing with Muscles / Skin Deformation