POV-Ray : Newsgroups : povray.general : parabolic mirror : Re: parabolic mirror Server Time: 26 Oct 2020 12:11:51 GMT
  Re: parabolic mirror  
From: Bald Eagle
Date: 15 Aug 2020 15:45:01
Le_Forgeron <jgr### [at] freefr> wrote:

> you need photons !

Yes, apparently one does.

I added
  reflection on
  refraction off

after the finish block, and

 photons {
  count 20000
  autostop 0
  jitter 0.4

to the global_settings block, and I got a faint square.
bumping up the light_source to rgb 10 made it more visible, so presumably using
a higher count or spacing will yield a similar effect, though at a slower render

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