not sure but thinking there's a problem with area_illumination when 
using it with scattering media ...

i first gathered radiosity data without using area_light then used saved 
rad data in a separate run.

in the first image with area_illumination off you see what it /should/ 
look like ... the second image (screen shot because of excessive render 
time) shows how the scattering media blooms out. i only let it run long 
enough to show the problem

i did a little troubleshooting to try to eliminate some of the things i 
/thought/ i may have been doing to contribute to the problem. during the 
radiosity gather i have a couple of no_image no_reflection no_shadow 
objects as radiosity helpers that are /not/ present in the scene during 
the media run ... that didn't make the bloom go away. the only thing 
that makes it go away is area_illumination off. is this a problem or 
should i /not/ be using area_illumination with scattering media?

same behavior with both uberpov and povray:

ash@linux-c2bm:~/POV-Ray/Source $ uberpov --version
UberPOV 1.37.1.0

ash@linux-c2bm:~/POV-Ray/Source $ povray --version
POV-Ray 3.7.1-alpha.8017570.unofficial

btw: discovered this after a 114+ hour beauty run ... needless to say 
(but in gonna say it) i was bummed out (don't get pissed off much these 
day) :-)

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Preview of image 'ai-off.png'

Preview of image 'ai-on.png'

Am 10.07.2015 um 15:37 schrieb James Holsenback:

> i did a little troubleshooting to try to eliminate some of the things i
> /thought/ i may have been doing to contribute to the problem. during the
> radiosity gather i have a couple of no_image no_reflection no_shadow
> objects as radiosity helpers that are /not/ present in the scene during
> the media run ... that didn't make the bloom go away. the only thing
> that makes it go away is area_illumination off. is this a problem or
> should i /not/ be using area_illumination with scattering media?

It certainly is a "problem" either way ;)

For more clarity what is going on, I suggest rendering the scene without 
radiosity. I expect that to have no effect on the problem.

It could be that area_illumination is broken with regards to scattering 
media - or it could be that you're doing something wrong.

Fact is, area_illumination and scattering media are /supposed/ to get 
along well.

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On 07/10/2015 11:13 PM, clipka wrote:
> Am 10.07.2015 um 15:37 schrieb James Holsenback:
>
>> i did a little troubleshooting to try to eliminate some of the things i
>> /thought/ i may have been doing to contribute to the problem. during the
>> radiosity gather i have a couple of no_image no_reflection no_shadow
>> objects as radiosity helpers that are /not/ present in the scene during
>> the media run ... that didn't make the bloom go away. the only thing
>> that makes it go away is area_illumination off. is this a problem or
>> should i /not/ be using area_illumination with scattering media?
>
> It certainly is a "problem" either way ;)
>
> For more clarity what is going on, I suggest rendering the scene without
> radiosity. I expect that to have no effect on the problem.

problem is still there without radiosity ... also removed the two 
radiosity helper objects

>
> It could be that area_illumination is broken with regards to scattering
> media - or it could be that you're doing something wrong.

well i'm thinking it's the former ... i was very careful about making 
sure the media container enclosed the building.

box { <-21, -0.1, -21>, <21, 10, 21>
   pigment { rgbt 1 } hollow on finish { diffuse 0 }
   interior {
     media {
       scattering { 3, 0.00275 }
       samples 32, 64
       intervals 1
       method 3
       }
     }
>
> Fact is, area_illumination and scattering media are /supposed/ to get
> along well.
>

thought so ... thanks

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On 07/10/2015 09:37 AM, James Holsenback wrote:
> btw: discovered this after a 114+ hour beauty run ... needless to say
> (but in gonna say it) i was bummed out (don't get pissed off much these
> day) :-)

here's a beauty run with area lights (area_illumination off) so you can 
tell what i was going for

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James Holsenback wrote on 11/07/2015 21.37:
> here's a beauty run with area lights (area_illumination off) so you can
> tell what i was going for
>
A nice ad evocative image!
Paolo

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On 07/13/2015 08:32 AM, Paolo Gibellini wrote:
> James Holsenback wrote on 11/07/2015 21.37:
>> here's a beauty run with area lights (area_illumination off) so you can
>> tell what i was going for
>>
> A nice ad evocative image!
> Paolo

thanks

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