Henrik Fisch nous apporta ses lumieres en ce 2005-03-30 08:34:
> I need this feature for simulating stretched materials like an inflated toy
> balloon. Normally you can look through the balloon. As your sight goes near
> the walls of the balloon, you will notice that the balloon is no longer
> transparent but will become more and more opaque. This feature is present
> for example in Poser (e.g. V 4.03), whre you can set a min and a max value
> for the transparency. But I can not find it in POVRay.
> 
> Please help. Do I miss anything in the documentation or is it not possible
> to do something like that?
> 
> Regards,
> Henrik Fisch
> 
> 
Another possible way: Make the baloon rgbt 1, give it some thickness and give it a
fade_calor of the 
couour you want and fade_distance <some prety small value>
That way, when you see it perpendicular, it's almost transparent, but when viewed a
low angle, the 
thickness becomes significant and the colour very visible. It should be faster than
using media.

Alain

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