On 14-1-2014 13:12, Thomas de Groot wrote:
> I can continue tweaking parameters, but I think this is about the best I
> can produce. So here is my final image.

Never say never however ;-)

I shall make a second /final/ render tomorrow with better visible caustics.

Thomas

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>Thomas de Groot  on date 14/01/2014 16.38 wrote:
> I shall make a second /final/ render tomorrow with better visible caustics.>

The post-final render?
:D
And don't forgot to add some drops of water on the floor. And a little 
veil of mist due to the evaporation. And...
;-)
Paolo

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Thomas de Groot <tho### [at] degrootorg> wrote:

>
> I shall make a second /final/ render tomorrow with better visible caustics.
>
> Thomas

It is very good that it not the end.
Thank you for your diligence!

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Thomas de Groot <tho### [at] degrootorg> wrote:


>
> I shall make a second /final/ render tomorrow with better visible caustics.
>
> Thomas

Look:
http://www.povray.org/documentation/3.7.0/t2_3.html#t2_3_7_7

If the object doesn't radiate photons (walls), the line photons { }, in
material, is absent

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Thomas de Groot <tho### [at] degrootorg> wrote:
>
> Maybe the default has been broken then?
>
> Thomas

spacing use to me is unclear.
In other cases the system hangs
Instead of [spacing] I use [count 10 000 000]

In docs:
 global_photon_block:

photons {
  spacing <photon_spacing> | count <photons_to_shoot>

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"LanuHum" <Lan### [at] yandexru> wrote:
> Thomas de Groot <tho### [at] degrootorg> wrote:
> >
> > Maybe the default has been broken then?
> >
> > Thomas
>
> spacing use to me is unclear.
> In other cases the system hangs
> Instead of [spacing] I use [count 10 000 000]
>
> In docs:
>  global_photon_block:
>
> photons {
>   spacing <photon_spacing> | count <photons_to_shoot>

I typically use spacing, starting with 0.1 and working downward until the
"focus" of the caustics is dense enough. In this scene my renders use:

spacing 0.00045

-------------------------------------------------
www.McGregorFineArt.com

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On 14-1-2014 17:50, LanuHum wrote:
> Look:
> http://www.povray.org/documentation/3.7.0/t2_3.html#t2_3_7_7
>
> If the object doesn't radiate photons (walls), the line photons { }, in
> material, is absent
>

That was not the problem. Photons /are/ visible in the image above but 
very diffuse. I just forgot to adapt the spacing parameter in 
global_settings to better values.

Thomas

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Thomas de Groot <tho### [at] degrootorg> wrote:


> - in Silo: giving thickness to the walls with the Shell utility (this
> probably exists also in Blender?);

In Blender, the modifier is called "Solidify".

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On 15-1-2014 11:55, Mr wrote:
> Thomas de Groot <tho### [at] degrootorg> wrote:
>
>
>> - in Silo: giving thickness to the walls with the Shell utility (this
>> probably exists also in Blender?);
>
> In Blender, the modifier is called "Solidify".
>
>
Excellent. It would be a good idea to use it standard for scenes like 
this test one. I noticed some light leaking along edges also in 
Luxrender and in the smaller image of the 'Other' renders, besides POV-Ray.

Thomas

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On 14-1-2014 16:57, Paolo Gibellini wrote:
>  >Thomas de Groot  on date 14/01/2014 16.38 wrote:
>> I shall make a second /final/ render tomorrow with better visible
>> caustics.>
>
> The post-final render?
> :D
> And don't forgot to add some drops of water on the floor. And a little
> veil of mist due to the evaporation. And...
> ;-)

...and some diffuse music coming from hidden loudspeakers, not to 
mention birds warbling outside. ;-)

No, I am quite content with what I have achieved. I have added photons 
to my panoply and learned a few fundamental lessons. My ToDo list is 
just a tiny bit shorter than it was. :-)

Thomas

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