Sven Littkowski <I### [at] SvenLittkowskiname> wrote:
> Hi
>
> is it possible to create a scene where the rendered items are visible
> but the entire empty background becomes transparent, if the output image
> is a PNG?

Of course.  This question has been asked loads of times, probably even by
myself.

TdG recommends:
background { colour srgbt <0.0, 0.0, 0.0, 1.0> }

http://news.povray.org/povray.newusers/thread/%3Cweb.58acb474275844131c311e660%40news.povray.org%3E/


Warp recommends activating alpha in the command line (+ua), and using no
background whatsoever:

http://news.povray.org/povray.newusers/thread/%3Cweb.4890c3a87699c0d4749f26950@news.povray.org%3E/?ttop=344503&toff=150


http://news.povray.org/povray.newusers/thread/%3C45033d21@news.povray.org%3E/


Whatever works for you.

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