I am using Home Designer Architectural and a new user. I have a 1/3 acre triangular sloped lot. I have x,y,z coordinates for the lot corner points with one corner starting at 0,0,0. I also have bearings and distances for each lot line. I have surveyed the lot and have about 100 points in x,y,z format referenced from the 0,0,0 point. I was successful in importing the survey data and can view the contours and terrain in 3d. It shows up as a square lot. What I cannot do is manipulate the terrain model to represent my triangular site using my reference 0,0,0 point. I cannot find any information on how to build the terrain model with the information I have. Do I need to upgrade to PROFESSIONAL version to do this? All advice is much appreciated.