I use Geoscape and Cartography Shop (full versions). I am very happy with them and have created entire worlds with them. 3D Canvas is also good. However, in order to make the worlds truely interactive, you must have a way to enter collision detections and secondly, gravity. To do this I personally like the Nuclear Glory set of .dll's They make it so simple. A lot of people like to use matrixes, for me that's too much work. With Nuclear Glory I can use .x files for everything and just use meshes for terrain and objects.Doing it this way, my terrains look so much better. So the bottom line is, I think for the low cost (compared to other simular applications) I didnt go wrong.
p.s. Remember, compatibility of you exports with the other applications are the most important issue to consider when buying these! Make sure they will port their files between eachother with out expensive plug-in's.
Hope this helped!
Zan
Remember, you never saw this...it was just a weather balloon, got it?
