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Am 21.10.2020 um 09:23 schrieb Paolo Gibellini:
> MichaelJF wrote on 20/10/2020 19:05:
>>
>> Render took 12 days, 17 hours and 25 minutes at an Intel Core i9@3.6
>> Ghz using all 16 Threats.
>>
>> Best regards
>> Michael
>>
>
> Almost two weeks but well spent: it's an idyllic scene!
>
> Paolo
Many thanks, Paolo! I think sometimes a longer break - not by choice in
this case, it was a headcrash - gives some room for new ideas and
improvements. I like the final image much better then the first approach.
Best regards
Michael
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Am 21.10.2020 um 08:35 schrieb Thomas de Groot:
> Good work sir. I like the mood (Sunrise indeed, as Alain already wrote;
> It is mainly a question of environmental temperature differences at
> start or end of day, I guess)
>
> I very often use a grey wall behind the camera, in addition to
> radiosity, especially for these kind of scenes. An old photographer's
> trick?
>
> The media on/off is something I have also been struggling with. It very
> much depends on the kind of output one wants to achieve (in addition to
> the quite different render time). I generally prefer the 'off' state.
>
Hi Thomas,
many thanks for your compliment. I'm not an experienced photographer but
I remember that professional photographers use white canvasses to
reflect the light of the sun or their flashlights especially in studio
ligthing behind or beside the camera. May be I invented the wheel again
here.
To switch media on or off in radiosity scenes depends on the scene and
the media used IMO. Having emitting media in a dark room one will like
to switch it on to illuminate the darker areas of the scene by the
media, e.g. a candle. Scattering media in bright light produce to much
reflections and the feature is better turned off. I think one cannot
give a generall guideline here. May be one can consider in a future
version of POV to implement a continous approach instead of the on/off
we have actually.
Best regards
Michael
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Op 21/10/2020 om 18:14 schreef MichaelJF:
> many thanks for your compliment. I'm not an experienced photographer but
> I remember that professional photographers use white canvasses to
> reflect the light of the sun or their flashlights especially in studio
> ligthing behind or beside the camera. May be I invented the wheel again
> here.
>
It works, and that is the main purpose indeed. Initially, I thought that
it was almost heresy to do such a thing when using radiosity, but I soon
learned to think out of the box and just do what I thought best. :-)
> To switch media on or off in radiosity scenes depends on the scene and
> the media used IMO. Having emitting media in a dark room one will like
> to switch it on to illuminate the darker areas of the scene by the
> media, e.g. a candle. Scattering media in bright light produce to much
> reflections and the feature is better turned off. I think one cannot
> give a generall guideline here. May be one can consider in a future
> version of POV to implement a continous approach instead of the on/off
> we have actually.
>
Yes, I agree.
--
Thomas
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On 10/20/20 1:05 PM, MichaelJF wrote:
> Am 22.02.2019 um 20:04 schrieb MichaelJF:
>
> Render took 12 days, 17 hours and 25 minutes at an Intel Core i9@3.6 Ghz
> using all 16 Threats.
>
Ouch. Let's see on my two core that would be... :-)
It's a very nice image!
Bill P.
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Am 10/20/2020 um 19:05 schrieb MichaelJF:
>
> Render took 12 days, 17 hours and 25 minutes at an Intel Core i9@3.6 Ghz
> using all 16 Threats.
>
Wow, this means about 35 kilogramms of carbon dioxide (roughly estimatet
for Germany with 500 gramm CO2 per KWh) for the final render. Just in
time before the rising water level will swallowed this land.
-Ive
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Am 22.10.2020 um 18:27 schrieb Ive:
> Am 10/20/2020 um 19:05 schrieb MichaelJF:
>>
>> Render took 12 days, 17 hours and 25 minutes at an Intel Core i9@3.6
>> Ghz using all 16 Threats.
>>
> Wow, this means about 35 kilogramms of carbon dioxide (roughly estimatet
> for Germany with 500 gramm CO2 per KWh) for the final render. Just in
> time before the rising water level will swallowed this land.
>
> -Ive
>
Thanks for your comment, next time I will put my electricity meter
between the wall and the machine. But if you assume 500 gramm CO2 per
KWh it must have been some 84 kilogramms, since the machine consumes
0,55 KW per hour at full throttle. And yes "green electricity" is "green
washing" in most cases. Every day I'm in my real office, I look at the
stone coal power station close to Frankfurt Central station and wonder
if there is really no connection to the station, since our fast running
trains (ICE) operating with 100 % green electricity only.
Best regards
Michael
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Am 22.10.2020 um 15:28 schrieb William F Pokorny:
> On 10/20/20 1:05 PM, MichaelJF wrote:
>> Am 22.02.2019 um 20:04 schrieb MichaelJF:
>>
>> Render took 12 days, 17 hours and 25 minutes at an Intel Core i9@3.6
>> Ghz using all 16 Threats.
>>
>
> Ouch. Let's see on my two core that would be... :-)
>
> It's a very nice image!
>
> Bill P.
Many thanks! But don't forget to calculate your CO2-emission too;) Yes,
Ive is right, but every gaming PC is burning 250 gramm CO2 per hour at
least. To run such a rendering once or maybe twice a year will not kill
the climate, but posting an image of ones breakfast every day or all the
other stupid stuff one can find at facebook, instagram, twitter,
whatsapp, telegram, signal, ... does.
Best regards
Michael
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Le 2020-10-22 à 14:32, MichaelJF a écrit :
nks! But don't forget to calculate your CO2-emission too;) Yes,
> Ive is right, but every gaming PC is burning 250 gramm CO2 per hour at
> least. To run such a rendering once or maybe twice a year will not kill
> the climate, but posting an image of ones breakfast every day or all the
> other stupid stuff one can find at facebook, instagram, twitter,
> whatsapp, telegram, signal, ... does.
>
> Best regards
> Michael
That depends on where you live. All of my electricity is of hydro
electricity source, so, no CO2 emission from me on that front.
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Alain Martel <kua### [at] videotron ca> wrote:
> Le 2020-10-20 à 13:05, MichaelJF a écrit :
> >
> > In fact, I have no idea if the images of a sunrise are very different
> > from the images of a sundown...
> >
> Sun rise tend to have a clearer sky and more ground fog.
> Sun set tend to not have any fog, but dirtier sky with more smoke and
> air borne dust.
>
> This is definitely a Sun rise.
I agree, My own 'visual experience' of the difference is that a Sun rise is a
bit more yellow than an orange-yellow Sun set, probably for the reasons that
Alain mentioned.
The final image is beautiful. And I am amazed that you were able to re-create
most of the scene, after that computer headcrash (ouch!)
My one suggestion for this scene (for the future, of course) is that the steam
'strands' needs scattering media (or more of its effect, if you are already
using it?) The reason is that even steam like this has a 'self-shadowing'
effect, to give it visual density-- nicely modeled by scattering media with the
appropriate 'extinction' settings. The scene as-is looks a bit like the steam
is 'overlayed' and rather uniform in its brightness/density.
Your hard work on this scene-- and your tenacity to keep at it-- has really paid
off!
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Am 24.10.2020 um 15:51 schrieb Kenneth:
> Alain Martel <kua### [at] videotronca> wrote:
>> Le 2020-10-20 à 13:05, MichaelJF a écrit :
>>>
>>> In fact, I have no idea if the images of a sunrise are very different
>>> from the images of a sundown...
>>>
>> Sun rise tend to have a clearer sky and more ground fog.
>> Sun set tend to not have any fog, but dirtier sky with more smoke and
>> air borne dust.
>>
>> This is definitely a Sun rise.
>
> I agree, My own 'visual experience' of the difference is that a Sun rise is a
> bit more yellow than an orange-yellow Sun set, probably for the reasons that
> Alain mentioned.
>
> The final image is beautiful. And I am amazed that you were able to re-create
> most of the scene, after that computer headcrash (ouch!)
>
> My one suggestion for this scene (for the future, of course) is that the steam
> 'strands' needs scattering media (or more of its effect, if you are already
> using it?) The reason is that even steam like this has a 'self-shadowing'
> effect, to give it visual density-- nicely modeled by scattering media with the
> appropriate 'extinction' settings. The scene as-is looks a bit like the steam
> is 'overlayed' and rather uniform in its brightness/density.
>
> Your hard work on this scene-- and your tenacity to keep at it-- has really paid
> off!
>
>
>
Many thanks for your comments, Kenneth.
Yes, I lost nearly all of the code by the headcrash and this frustrated
and paralyzed me for a longer while. I lost nearly all the code but not
my memory about the creation of the scene. So after a while I restarted
the project from scratch since I still took it for a fine idea.
And yes I used scattering media. I made some mistakes and we discussed
them here in February 2019 in this thread. Thomas and Alain gave some
very valueable hints for improvment. Many thanks to them again.
Best regards
Michael
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