"Marc Jacquier" <jac### [at] wanadoofr> wrote in message 
news:43c91030$1@news.povray.org...
>

> news:43c8e541@news.povray.org...
>>       function { exp( -(sqrt(x*x+y*y+z*z)-6000)/4 ) }
> That's the function I couldn't work out!

Well I have a friend with a PhD in astrophysics, which means whenever I have 
astronomical/planetary questions I usually ask him, then he tells me he 
doesn't have a clue and goes off and looks it up for me :)

The formula is just an exponential decrease in density away from the earth's 
surface, which is close enough to accurate to look pretty nice.

-- 
Tek
http://evilsuperbrain.com

Post a reply to this message