As far as I know Wilbur does not have a size limitation, think it depends on how much memory it can grab from your machine. I have in the past got terrains with huge dimensions into wilbur! I had a look at the terrain editor, and it limits the terrain size to a maximum of 2048 x 2048! I can't find a way of increasing these values if I have a terrain with greater values to go in true-scale. Not sure how you could get a 5000 x 5000 pixel image map in without losing quality and true-scale Varian, but maybe there is a trick to it. I match the pixel size of the image map I load to the dimensions of the terrain I create in the terrain editor, which I assume is correct :) Lester