The ActiveShade button, available from the Render flyout, creates an ActiveShade rendering in a floating window.
You assign which renderer to use for ActiveShade rendering on the Assign Renderer rollout of the Render Setup dialog
Common panel.
ActiveShade gives you a preview rendering that can help you see the effects of changing lighting or materials in your scene. When you adjust lights or materials, the ActiveShade window interactively updates the rendering.
To create an ActiveShade rendering in its own window, choose the ActiveShade command from the Render flyout on the main toolbar.
Creates an ActiveShade rendering that is "docked" in a viewport.
When you right-click an ActiveShade window, the lower-left quadrant of the quad menu displays a set of commands for ActiveShade.
