Am 27.08.2015 um 23:08 schrieb MichaelJF:
>>> The hole debate here is only about theory. Can you post the source
>>> code? Most
>>> likely I'm not the one to spot the difficulties but others may be
>>> able to do so.
>>>
>>> Best regards,
>>> Michael
>>
>> First of all, the original question was about theory.  Secondly, I'm
>> not asking
>> for help fixing code: I'm using a water material (slightly modified)
>> that was
>> provided in a previous thread, if that doesn't work right nothing will.
>>
>> The problem is most likely due to six overlapping light boxes, plus
>> water which
>> has been said to be slow under ideal conditions.  The only viable
>> option I can
>> think of is to get rid of the point lights entirely and switch to some
>> sort of
>> radiant lighting, which is what the question was actually about.
>>
>> so, to reiterate, does anybody have a good way to make luminous flames
>> without
>> point lights?
>>
>> Regards,
>> A.D.B.
>>
> I'm still not quiet sure that you can solve this riddle only by theory.
> I assume there are additional conditions at work here to slow down the
> rendering of your water that dramatically.
>
> Since I have a somewhat simliar scene in my mind I played around a bit.
> I stole a fire from the IRTC (emissive media), modeled a small scene
> which is somewhat similiar to yours (at least the position of the
> "fires" and the water with respect to the camera should be comparable).
> I added a dimmed yellow light_source to the media to get the water
> transparent. The "fires" are repeated 6 times. The water material is
> yours from your "looking for water" thread but I incorporated clipkas
> comments on the demo scene water - and scaled the normal down. The
> rendering was slowed down by command line options (+bs8 +wt6 +r4).
> Radiosity settings were Radiosity_IndoorHQ from rad_def.inc. Parsing and
> rendering was done in 14m 52s. Without the water: 2m 5s. Machine: Core
> i7@3.4 GHz.
>
> So I must have left out a constraint you have in your scene.
>
> My own scene will be different from yours, but the lighting situation
> and the position of the pool relative to the fires are similiar. The
> media of the fires must be improved of course.
>
> Best regards,
> Michael
>
>
I have forgotten to mention that I turned on media and normal within the 
radiosity block (@Alain: thanks for this reminder) and I used aa 0.3 
from the Quickres.ini.

Best regards,
Michael

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