Lars W. wrote:
> 
> Hi
> 
> I am trying to combine real Images, and POV-Images, and for that i need
> to know
> how to create Objects, that make shadows, but are not seen, i mean they
> must be
> 100 % transparent, but the shadows must be dark.
> 
> Does anybody know if such things are possible with POV-Ray ?
> or maybe knows some alternatives ?
> 
> greetings Lars Wolter
> 
> E-Mail : lar### [at] snafude
> Homepage : www.snafu.de/~larts.wolter

How realistic does the shadow have to be?
You can create a 'shadow' by using a light_source with a negative colour
value.
eg. point a spotlight with a colour of rgb -1 at the ground and you'll
get a dark 
circle.  As for real shadows from invisible objects, sorry no ideas.

Cheers, PoD.

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