Hello, i got some little questions about level/map development. i m working on a GLclient for a mmorpg-server our team developed. the first thought about that game were, not to use polygon based level/map. it should be 2d tiles projected on the XZ. after some really hot discusions, i forced our designer to think about polygons to walk on... (to get more realism) the mainproblem is, that im not really new to opengl, but also im not the pro-coder. now the question... (omg how do i let the moving objects stay on my floorpolygon? i know it could be some linear algebra? is this tricky or can someone just tell me some "keywords" for google? maybe it help if i tell, that we using milkshape models for the levels (btw. we only use outdoorlevel). there is no need to pre-chew it. just some hints would be nice °Yoki