Stefan Viljoen schrieb:

> I've got a simple scene with photons that renders fine in Windows official
> 3.6 and Windows Megapov 1.2.1.
> 
> However, trying to render it with Linux official 3.6.1 binary or
> Linux "Official" Megapov 1.2.1 always results in a completely black output.
> 
> I've fiddled around and removing the photons{} block, when trying to render
> in Linux (with either Megapov official binary or Povray 3.6.1 official
> binary) again renders the scene correctly / visibly (without photons, of
> course).
> 
> I've also tried compiling Povray 3.6.1 and Megapov 1.2.1 from source locally
> on Linux, and they too give a completely black output, if at any time a
> photons{} block is included.
> 
> Any idea why adding photons{} in the Linux versions of Povray / Megapov
> always give a totally black result?
> 
> Anybody else heard of this?

That's perfectly new to me. I've run both POV-Ray 3.6.1 and MegaPOV 
1.2.1 on both Windows and Linux with various photons scenes, and never 
seen such effects. Did you try the photons sample scenes?

For instance, the scene "scenes/advanced/newdiffract.pov" uses photons, 
and renders "out of the box" on all of my machines; if even that scene 
only gives you a black output, there's something fundamentally wrong 
with your Linux installation of POV-Ray.

Did you make sure the default quality settings are high enough? Maybe 
you have set "+Q5" (or "Quality=5", or even lower value) in povray.ini 
or some such. (Then again, such a low quality setting should have other 
suspicious effects.)

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