LiquidMaya

From PixieWiki

Liquidmaya is an open source Maya exporter for RenderMan compliant renderers, including Pixie.

The current version is really a lot more than an exporter. Shader management, all the render settings and even preview renderings can all be done within maya. Here's a couple of quick previews of the intereface.

You can find out more over at http://liquidmaya.sourceforge.net/liquidwiki/