hi, i found this out in nvidias website (link at bottom) and i''ve done a short implementation but i''ve got a problem due to the nature of the teknique(www.geocities.com/chicoze2/elevmapsprob.jpg).... has anyone tryed this teknique? i think the it has really good chances cos of its simplicity... http://partners.nvidia.com/Marketing/Developer/DevRel.nsf/045cfdb95e306a4d882568170059fa93/e02300d70333940988256866007a46d9/$FILE/ElevationMaps2.pdf thanks in advance for your opinion , ChicoZe