Thanks for the link, but it's all in a language I can't read....sorry.. I did download the Landscape demoand it's great, nice work

BTW Savage found this the other day http://www.fl-tw.com/Infinity/infinity_media.php

This guy has done some amazing work, which is kind of what i'm after with the terain sphere. I'm still stuck on the LOD calculation so if anyone else has any ideas I would be greatful

Cheers

Dean