OK good, as I was thinking. The only way I know how is to load your terrain in Old terragen, in the Landscape window click on modify terrain, in the set height range from put your "from" number to 0.m, (if you have a minus figure there it will sink it into the heightfield in TGTP) then play around with the "to" number (which is the max hgt. you want) until you get what you want. This way when you load your terrain in TGTP it should set it on top of the Heightfield instead of creating a depression in it. You with me on this?