Here is a screenshot of a couple of landscape system screenshots loaded in
Paint Shop Pro 5. The 3 top screenshots (and the the one at the bottom) are
all shots taken from the system with texture-generator. The terrain-texture
is pre-calculated using parameters which specify the type of terrain and then
mapped onto the heightmap. So textures are never repeated (tiled) in the
landscape but all parts of the terrain-texture are unique.