Maya/Mental Ray: Linear Workflow

Maya/Mental Ray: Linear Workflow Part 1 from zeth willie on Vimeo.

Maya/Mental Ray: Linear Workflow Part 2 from zeth willie on Vimeo.

Maya/Mental Ray: Linear Workflow Part 3 from zeth willie on Vimeo.

Maya/Mental Ray: Linear Workflow Part 4 from zeth willie on Vimeo.

Other good reference on web
http://whetstonevfx.com/blog/?p=91
http://www.gijsdezwart.nl/tutorials.php
http://mentalraytips.blogspot.com/
http://3dlight.blogspot.com/