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mental ray lighting and rendering opens up a large range of possibilities within Maya. As with all rendering, lighting plays the primary role. We will cover mental ray rendering more in the next chapter, but because rendering and lighting go hand in hand, it's tough to ignore in this chapter. This section is a primer on mental ray light functionality.
NOTE
Open the Render Settings window by choosing Window → Rendering Editors → Render Settings. If you don't see the mental ray for Maya (or any other, such as the Vector) option in the Render Using drop-down menu, you will need to load the plug-in. Choose Window → Settings/Preferences → Plug-in Manager to open the Plug-in Manager. Make sure Mayatomr.mll is checked for Loaded as well as for Auto Load to ensure that it loads by default.