"Fractracer" <lg.### [at] gmailcom> wrote:
> And second Pov3.7:
>
> A lot of differences!

Ah, that's because CIE_Skylight.inc uses ambient 1 on the sky dome, which
doesn't work in POV-Ray 3.7 when radiosity is used.  (This is an example of why
I used Version=3.5 on the command line instead of Version=3.7.)

For public include files and demo scene files, I suggest changing all
occurrences of ambient 1 to:

  #if (version < 3.7)
    ambient 1
  #else
    ambient 0 emission 1
  #end

Of course, for your own scene files, where you know you'll be using 3.7, you can
just use emission 1.

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