Autodesk Maya 2012 software delivers new toolsets for previsualization extended simulation capabilities, and improved pipeline integration. Artists can more easily explore, refine, and present their ideas prior to final production, thanks to a high viewport; node-based render passes; camera sequencer enhancements; and new camera rigs, while editable motion trails make animating easier. With new physics solvers, together with enhancements to the Nucleus unified simulation framework, artists can create a wider range of convincing effects in less time. In addition, added support for vector displacement and Ptex maps and single-step interoperability with Autodesk smoother multi-application workflows.
Maya 2012 What's New 
Top Ten Reasons to Choose Maya 2012
More at: http://www.autodesk.com/maya