Very interesting experiments, Rene. I should try some of these now 
that I just moved to MegaPOV 1.1... :)

> 4 - I've tried with other 'things', but unsuccessfully.
> [ Jaime : I've tested your 3d cafe skull idea, but unfortunately does'nt
> work here. I don't know how you really did it. 

   I just placed the skull over my current experiments... call it "good 
luck" that it worked with my media setup.

> http://bambousette.free.fr/head_experiment/other_sssexperiment.jpg

   Media is very sensible... what works well for a concrete setup, 
creates artifacts with other conditions. In my tests I did use just 
standard scattering and absorption, and also interior fading:

   interior{
    fade_distance .00001 fade_power 1000 fade_color Red
    media{
     absorption mb*2
     scattering{1,mb}
    }
   }

   with mb set to 3. The image_map uses "transmit all .4 filter all .1".

   After my last post here, I done a few more tests:

   http://www.ignorancia.org/img_page.php?image=0&db=wip

   Looks like it's not a bad idea, but I fear the work required to 
create my own skull, and then remodeling the head to fit the same shape...

--
Jaime

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