Ok, I have done a little work with Transdem. Today, I put a DEM of Putnam County in Trainz which is north of Westchester but just south of Dutchess County. Instead of having the whole DEM, in the trainz surveyor for about 90 minutes or so, I manually deleted around 1000 baseboards. I only kept the baseboards that were near interstate highways, or major U.S. roads that are close to tracks. Right now, one portion of Putnam County will cover the upper Hudson line (diesel only) and about 25 miles east of the Hudson line is the upper portion of the electrified section of the Harlem line with some of the abandoned Maybrook/Beacon line. If I try to merge the DEM, it may not piece together perfectly but that is ok. This is just trainz after all. If it doesn't merge correctly, I can probably create baseboards which isn't that much work. Now that I have trimmed the DEM, it's time to start working on the scenery. Screenshots of my progress will be posted soon. Also as a heads up, tomorrow is National Train Day. Can't wait to take pictures of some of the oldies and current passenger equipment along the Metro North Railroad.