vray hair controlling direction

VRay - VRayFur : controlling growth direction through RGB maps

Mental Ray Tutorials

Depth of Field
9 ways to improve your renders and artwork with mental ray
Lighting with mental ray - 3dsmax Tutorial
Rendering WIP Images
clay render with mental ray final gather in 3ds max



http://www.tutorials-expert.com/tutorial/19528/3d-Max-Mental-ray-exterior-light-render-setup-tutorial.html