This is just a note that I hope will be of use to new Carrara users on PCs. Often Carrara appears to lock up: no hour glass, not responsive to mouse clicks and so on. Often times you have simply asked it to do something very demanding. It is worthwhile to do a CTRL-ALT-DEL and check things in Task Manager. The Programs tab may show Carrara as "not responding" but a check of the Process tab may show that Carrara is actually chugging away. If the memory usage figures are high and changing chances are that if you give it enough time it will get done with whatever it is about. Of course then you must decide if what you just asked Carrara to do was worth the wait! HTH