Hi, I want to draw straight lines on a terrain. In Real World Bryce (pg 349) it says to press the Shift key and I will only be able to drag the brush horizontally, vertically, or at a 45 degree angle. When I try it, I can only drag it horizontally. I want to make vertical lines and 45 degree angle lines too. Any suggestions? I don't find anything about this in the manual. Thanks, Willow