Among other things, gawryl saw fit to write:

> i'm wondering is it possible to plot an isosurfaces (density) 3D-plots
> based on the complex double precission numbers (ASCI file)? i haven't got
> explicit formula for this surface, data comes from my numerical
> calculations...
> 
> i need to know it before i start learning povray
> (because maybe it isn't a software which i'm looking for)

In case you don't know it, there's a program called VMD
(<http://www.ks.uiuc.edu/Research/vmd/>) which you may find useful. It can
display isosurfaces from volumetric data in OpenGL, have a look at section
7 of this tutorial:
<http://www.theochem.ruhr-uni-bochum.de/~axel.kohlmeyer/cpmd-vmd/index.html>.
By the way, it can also export to POV-Ray (as a mesh, I guess), so you can
fiddle with lighting and textures afterwards.

-- 
light_source{9+9*x,1}camera{orthographic look_at(1-y)/4angle 30location
9/4-z*4}light_source{-9*z,1}union{box{.9-z.1+x clipped_by{plane{2+y-4*x
0}}}box{z-y-.1.1+z}box{-.1.1+x}box{.1z-.1}pigment{rgb<.8.2,1>}}//Jellby

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