The Render flyout provides a few different rendering options.
The Render flyout lets you choose among these buttons:
The Render buttons let you render the scene using the settings without using the Render Setup dialog. Choosing one of these buttons also changes which rendering settings are active on the Render Setup dialog.
Invoking the Render command from the Rendering menu or by pressing Shift+Q uses the active mode on the Render flyout.
By default, all the rendering options use the default scanline renderer. You can change the renderer assigned to Production or ActiveShade by using the Assign Renderer rollout on the Render Setup dialog 
Common panel.
