I think jfike has it right. Family colors and attribute names helps but it is still visible. Solo mode simplifies the mess when working on small bits, but the finished product will still have unwanted wire frames showing. You can select "view as a box" when you have finished your booleaned object to clean up some of the mess-mesh and speed up refresh times and clear up memory. @ Fran... just right of tool bar that allows you to select all objects of similar type (terrains, sheres, plains ...) click the button in center of what looks like fast forward, fast reverse control. It turns red and only the object(s) selected from your scene will appear on the screen along with the background sky. It makes for easy manipulation and testing of the selected object. Did that make sense??