I am examining blitz3d now since 5 hours. I would like to use lod because the terrain has to be really big,so i must use LoadTerrain. I want to give the player the possibility to build streets on the terrain. How can I do that? I normaly would do this task with multitexturing in the moment, the corresponding vertices are drawn. The next possibility would be some textured quads with the vertices with a transparent texture on it alligned with the terrain itself a little higher, but that has some problems in distant streets. As I see it, my only possibility is to write my own ROAM or simillar algo. and extend (which I am hopefully able to) the basic with my own implementation. Any ideas?