This script allows you to see the outpot of the rendering process (images during rendering) using imf_disply, and it's working with passes, yet with render layers. "this is a simple version of the concept".
Converts standard image files (jpg, png, tif etc) into memory mappable files for use with Mental Ray. The .map files are Mental Ray's native format and work very efficiently in comparison to normal images when rendering.
Mass Instancer is a production quality plugin built for creating complex geometry instancing effects using Maya and Mental Ray. By combining numerous customization parameters and particle-driven instance placement, effects such as large crowds, cityscapes, forests and explosion debris can be set up with ease.