I notice BTB use a sort of planar mapping for ground ... it seems that this mapping don't have nothing related with the polygons form, but rather map over the ground mesh like squares. It is very good for importing into max, because you can use one texture in material editor and everything is mapped. But my problem is that, if I modify and move the polygons, this texture gets distorted and it looks all messed up. So, I came to conclusion that this kind of mapping have nothing in common with for example UVW Unwrap which use polygons for texturing. I would like to know what type of mapping is that, and how to reset it after moving terrain polygons. Do I have to reset mapping xform ? Which parameters you use under UVW Map ? Which size, etc ... Thanks !