i'd like to create a really huge terrain. it seems to me that 3dgs doesn't support 1 huge piece of terrain but rather many pieces of terrain 'stitched' together. the problem is that i can't find a software to do this stitching or splitting and even if so, there're always visible seams and possibly collision detection errors as a result (such as terrain height queries at the boundaries).

can anyone provide any advice on this?