3ds Max - Ignore Backfacing

Here is something for increasing your rendering time. Ignore Backfacing. From the Autodesk 3ds Max Help menu "When on, selection of sub-objects affects only those facing you. When off (the default), you can select any sub-object(s) under the mouse cursor, regardless of their visibility or facing. If there are more than one sub-object under the cursor, repeated clicking cycles through them. Likewise, with Ignore Backfacing off, region selection includes all sub-objects, regardless of the direction they face."