This site has been stated "under construction" for quite some time now. Therefore I guess the "being constructed" state became permanent and its more of a character now, than a state. At the moment there are some Mental Ray and Maya related things I wrote online and hopefully in the future there will be more of them.
- Horvátth Szabolcs -
ReflectionUtility 1.3 - A Mental Ray shader that computes blurred reflections. (Windows, Linux and OSX version.)
RayType 1.1 - A Mental Ray shader that lets you assign different shaders to different kind of raytrace calculations.
FramebufferOutput 1.0 - A Mental Ray geometry shader that enables framebuffers for multi-pass output.
FramebufferWriter 1.0 - A Mental Ray material shader that writes the connected shaders' output into separate framebuffers.
Maya files for 3rd party Mental Ray shaders
Diffraction - Daniel Rind's Diffraction Mental Ray shader, that computes blurred refraction and chromatic aberration.
Dirtmap - Daniel Rind's wonderful Dirtmap 1.2 Mental Ray shader for computing ambient occlusion.
lm2DMV - Guy Rabiller's Mental Ray shader, that computes motion vectors for rendering motion blur in post.
Tranvol 2.01 - Maya files for Andy Hayes' Tranvol Mental Ray shader, that computes sub surface scattering.
Mental Ray for Maya related scripts
Enable FinalGatherTraceReflection - Maya 5.0.1 RenderGlobals modification to display two hidden attributes
Articles and Tutorials
Using framebuffers in mental ray - How to use framebuffers. And why.
Mental Ray Sampling (adaptive sampling settings) - An article on sampling settings and techniques of Mental Ray.
Where hides Mental Ray in Maya? - Shaders - An article on the Maya location of the shader types of Mental Ray.