Not a Problem, but... If you try to switch on the fly between Bryce5 and another open app using the start bar Bryce won't let you. Clicking on the open app on the bottom bar also interupts your current render. The small blue dot of the five on the Bryce control panel to the right of the center one is the resume render button. It will start things again without going back to the beginning. To use your computer during the two days that it is rendering start the render then go up to the top of the screen with the mouse to make the bryce control bar appear. Click on the minus(-) button to minimize bryce to the task bar. You can now use office, explorer, etc. while bryce continues to render. One other thing, If you are saving a large bryce file over 100meg watch your drive light. Bryce tells you it's finished saving long before all the data is stored. Windows XP task manager doesn't seem to recognize bryce is a running task. You can shut down windows before your file saves.