May require a modified storage format to keep it accreate but dems are samples of the earth and the earth is mostly round. The files are slightly distorted if pojected to a flat surface, reverse of the effects of putting a flat surface on a sphere. ----- Original Message ----- From: "John D. Gwinner" <jgwinner@xxxxxxxxx> To: <leveller@xxxxxxxxxxxxx> Sent: Monday, August 22, 2005 11:56 AM Subject: [leveller] Re: And onward we go That would be nice - I need to do that myself and could take the accuracy hit (I'm doing Mars images and making up a lot of detail anyway). How do you do it with the existing tools? I thought it only worked if you exported as poly's. I was thinking for my purposes a vertical offset via mapping would be OK as long as it was accurate. I'm building an anim of a maglev going from Pavonis Mons (a space elevator) to the middle of Valles Marinaris. == John ==