In SOLIDWORKS Composer 2011x, for per-pixel rendering, Depth of Field, Anti Aliasing and Ambient Occlusion you have complete control over the behavior when toggled on and off in the properties.
Our recommended settings are to “Use Document Settings” and set to “On Idle”.
To do this go to “File > Preferences > Viewport” and set everything under High quality rendering to “Use Document Settings” and “On Idle”.
When all of these are set to “Use Document Settings” you can control it “On-Off” from the environment properties. Click in the viewport without any models selected and the new options will appear in the properties pane. When these settings are set “Enabled” within the Application Preferences it will be on all the time regardless what’s in the properties, and “Disabled” will do the opposite. Have them all set to “On Idle” that way it will process once you stop editing or rotating the model instead of your system trying to render it out in real-time.
“Use Document Settings” and “On Idle”, toggle these enhancements on and off in the environment properties for best results.