Hello povers,

Here is a fly by of Valles Marineris on Mars. I think the relief is a bit to
high. Maybe there is something I did not understand exactly with
isosurfaces. Here is the function I use :

  #declare pl_radius = 3396;
  #declare min_alt = -8.208;
  #declare max_alt = 21.249;
  #declare alt_fct = max_alt - min_alt;

function { f_sphere(x,y,z,pl_radius+max_alt) -
alt_fct*f_relief(x,y,z).gray }

The f_relief function is an image_map as the ones we use with a height_filed

Thanks for any help.

-- 
ZeSly
http://perso.wanadoo.fr/zesly/

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