Archive notice: This article was originally published on June 19, 2012. Links and embedded videos are preserved as part of the historical record.
For better visualization, users can decide themselves how the color appearance of the frame range is intended to look. By default, the following frames are colored red and the leading frames green. A really good feature is that onion skinning can be applied to multiple objects in a scene simultaneously. Users need only create a new set for each object and then determine themselves which one is to be worked on. Nevertheless, all frame ranges are visible. This helps immensely with interaction between two characters or object interaction without the use of multi-physics simulations.
The plug-in was written on the basis of pyMel and, according to Anzovin Studio, thus guarantees compatibility with Maya versions from 2011 upward. Naturally, this is under the assumption that Autodesk does not plan major changes to pyMel for new Maya versions.
The plug-in is available to purchase as a download version for 29 dollars through the Anzovin Store page.
The following video shows an earlier beta version of the plug-in. Since then, only the interface has changed:
Source: Anzovin