To use the DTE as the source for a terrain hold down the ALT+CTRL (PC) or OPTION+ CMD (Mac)and click the Picture Button. When you exit the DTE make sure that you wait until the DTE file shows in the TE preview - it can take a very long time to process and there's no indication that it's working. Clicking will it's still digesting the info causes it to abort the DTE load. HTH; Dan