Thanks Calico,
Yes it does well with exact measurements for creating machines, architect, yachts and other products , the camera on my site was done in exact measurements but Titanic Grand Staircase, Steam engine and station were just done by looking at images, the steam engine only had one view on the internet that I could find. But I think its fun way to model.
What kind of things do you plan on modeling, are you going to bring them into Terragen?
Glen