I made a mistake with the last distribution of Rez - things were in the wrong directories so I have updated it. The main change with this new version is that the parser is now a plug-in class so you can more easily use a different elevation file parser. There is also a very small example 2-level world with the distribution. see http://www.surak.com.au/~chris/home/vrml/elgrd/elgrdindex.html Chris