Check your mesh and select Triangles, Quads, N-Gons, Concave and Lamina faces, Holes and Non-Manifold issues. (more)
For setting VRay Texture Input Gamma (more)
An interface to a bunch of V-Ray for Maya controls and useful embedded scripts. (more)
Palette with handy scripts for working with meshes (more)
Virtual Reality for Autodesk Maya, with Oculus Rift or HTC Vive. (more)
*Note: This is a downloadable item, not a physical product!