This Renderer menu displays above the scene view, or above each view panel in a layout with multiple scene views.
Select Renderer > Viewport 2.0 > to set the Viewport 2.0 options.
You can write your own plug-in and override the scene view renderer with the interactive renderer that you created. Once you have loaded your plug-in via the Plug-in Manager, the name of your custom renderer will appear under the Renderer Panel menu (for example, Renderer > openGLViewport Renderer). If you choose to load multiple custom renderers, they will be listed in the order that they are loaded.
Two example plug-ins have been provided with the SDK, one for OpenGL and one for Direct 3D. (Note that these example plug-ins have not yet been compiled and need to be compiled before they can be accessed via the Plug-in Manager.) For more details on API classes that can be used to create these plug-ins, see the Maya Developer Help.
Lets you render a Maya scene using a Hydra render delegate.