Rendering menu > Render > Render Scene dialog > Render panel
Main toolbar > Render Scene > Render Scene dialog > Renderer panel
The Render Scene dialog's Renderer panel contains the main controls for the active renderer. Depending on which renderer is active, additional panels can become available.
Tip: The default scanline renderer and the mental ray renderer each have their own capabilities. In general, for each scene, you will decide which renderer you want to use. It is a good idea to design materials with a particular renderer in mind. The mental ray Connection rollout lets you add features unique to the mental ray renderer to basic Autodesk VIZ materials.

The renderer panel contains these rollouts:
Sampling Quality Rollout (mental ray Renderer)
Rendering Algorithms Rollout (mental ray Renderer)
Camera Effects Rollout (mental ray Renderer)