Maybe I've smoked too much tonight but I think I understand what you mean. Terrains ( in blitz at least ) only give uniform x, z coords so what you need is a modeller that supports bezier patches. Bezier patches will interpolate in all axis.
I'm not sure if there are any free modellers which support this. You may find that you'd be better studying the technique and creating a blitz program to build the terrain meshes which you could then save as .B3d using some code in the archives. There is some bezier patch code in the archives and I have my own variant if you want a butchers.
Stevie
I'm not sure if there are any free modellers which support this. You may find that you'd be better studying the technique and creating a blitz program to build the terrain meshes which you could then save as .B3d using some code in the archives. There is some bezier patch code in the archives and I have my own variant if you want a butchers.
Stevie