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This menu lists all Render Passes currently in the scene. Select one to make it active and display all its attributes right below. The active one is used when launching renderings using the various menu items and shelf buttons. It is also the one used when rendering using Maya's Render command line (see Batch Rendering). By default there is only one Render Pass and it is named 'renderPass'.
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Only the Render this Pass button in the Attribute Editor can explicitly launch a rendering with a pass other than the active one the in Render Settings. |
Create Render Pass
The Create Render Pass button creates a new Render Pass and sets it as the Active Render Pass.