Thanks... I wouldn't of thought to look up z fighting. Anyway, my plan is sitting on a large terrain which sounds like that causes these kinds of problems. I worked hard to get my 5 acre parcel with a cliff, etc represented in HD as a the terrain before drawing the home plan. Anyway, I was excited when I read about simply setting the clipping distance when doing those kinds of larger views. But it doesn't appear to be available in HD Architectural. At least I couldn't find it. Am I simply missing it somewhere or am I out of luck?