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19 Apr 2024 16:52:03 EDT (-0400)
  sky light render (Message 18 to 27 of 47)  
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From: And
Subject: Re: sky light render
Date: 9 Jan 2017 02:00:05
Message: <web.587333d087bb2a51473b58ee0@news.povray.org>
clipka <ano### [at] anonymousorg> wrote:
> Am 08.01.2017 um 15:51 schrieb And:
>
> > I want to give up...
>
> And we want you to continue ;)
>
> > I posted the fruit too early... I just tested the cloud shape and it is hard to
> > control. And too much work (includes reducing the render time) in the future.
>
> "Hard to control" is just a pessimist's way of saying "something
> encouraging to toy around with".

Ha ha..

> As for the render times, I gather that this whole thing is a stand-alone
> program, right? So maybe it would be worth trying to port this to OpenCL
> and get your graphics card to do the job. I reckon the computations
> should lend themselves to the architecture of GPUs.


GPU is an unfamiliar field to me.

> That said, if you decide to cease work on it, maybe you could publish
> the source code under some free-ish license, so that others could pick
> up on it. From what I see, it has a lot of potential that would be a
> pity to waste.

That's a good idea but the code is ugly currently(ew). If I decide to cease
work, I will publish it that time


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From: And
Subject: Re: sky light render
Date: 9 Jan 2017 02:10:01
Message: <web.5873366b87bb2a51473b58ee0@news.povray.org>
"omniverse" <omn### [at] charternet> wrote:
> "And" <49341109@ntnu.edu.tw> wrote:
> > "omniverse" <omn### [at] charternet> wrote:
> > > "And" <49341109@ntnu.edu.tw> wrote:
> > > >
> > > > These images took unfavorable render time, about 12 hours for the left two
> > > > demos, they are from a 1024x512 spherical image.
> > > >
> > > > My computer is amd fx-8350 but in fact I can only run it in half speed with my
> > > > program.
> > > >
> > > > I ever tried the "reduse noise" filter of Photoshop and it is what benefit the
> > > > situation so write a filter is a solution, too.
> > >
> > > Whew! Yeah, long time.
> > >
> > > I don't know how you're doing these but the last 4 skies look very good if I
> > > ignore the color noise.
> > >
> > > If you could monochrome the most intense colors that might help.
> > >
> > > Bob
> >
> >
> > I don't understand.
>
> I was thinking of post-processing filter, too, like was mentioned before. I
> don't know how possible that is though. Idea being, desaturate colors that go
> beyond a certain threshold since the overall colors of the sky isn't fully one
> color or the other.
>
> Of course, that still would show a kind of colorless noise. The ideal thing
> would be to duplicate nearby colors and replace the intense red, green and blue
> colors with those. Yet again I don't know the limitations to such filter
> creation. Just was thinking out loud.

I got it. That is something like the median filter. Well


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From: And
Subject: Re: sky light render
Date: 25 Jun 2018 02:45:02
Message: <web.5b308f5187bb2a512d85b1510@news.povray.org>
Some new updates here


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From: And
Subject: Re: sky light render
Date: 25 Jun 2018 02:55:01
Message: <web.5b30919787bb2a512d85b1510@news.povray.org>
"And" <49341109@ntnu.edu.tw> wrote:
> Some new updates here

Wrote some codes in java to simulate the effect as Pov ray's turbulence warp.


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From: And
Subject: Re: sky light render
Date: 25 Jun 2018 03:00:01
Message: <web.5b3092ba87bb2a512d85b1510@news.povray.org>
pure sky:

sun angle 0 degree


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From: And
Subject: Re: sky light render
Date: 25 Jun 2018 03:05:03
Message: <web.5b30939b87bb2a512d85b1510@news.povray.org>
sky:

sun angle 10 degree above horizon.


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From: Stephen
Subject: Re: sky light render
Date: 25 Jun 2018 04:12:01
Message: <5b30a3d1$1@news.povray.org>
On 25/06/2018 07:59, And wrote:
> pure sky:
> 
> sun angle 0 degree
> 

I like this but 18 hours render time! What is the resolution of the image?

If the sun is on the horizon should it not be redder?

BTW can your sky sphere map generator, create a green flash?

https://en.wikipedia.org/wiki/Green_flash
https://www.youtube.com/watch?v=lwus2nqU0SY


-- 

Regards
     Stephen


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From: Stephen
Subject: Re: sky light render
Date: 25 Jun 2018 04:13:22
Message: <5b30a422$1@news.povray.org>
On 25/06/2018 08:02, And wrote:
> sky:
> 
> sun angle 10 degree above horizon.
> 

Nice but never look directly at the sun. ;-)

-- 

Regards
     Stephen


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From: And
Subject: Re: sky light render
Date: 25 Jun 2018 07:20:01
Message: <web.5b30cee187bb2a512d85b1510@news.povray.org>
Stephen <mca### [at] aolcom> wrote:
> On 25/06/2018 07:59, And wrote:
> > pure sky:
> >
> > sun angle 0 degree
> >
>
> I like this but 18 hours render time! What is the resolution of the image?
>

Only 720x360

> If the sun is on the horizon should it not be redder?
>

When the sun is on the horizon it can be yellow, red, or invisible, just depend
on the atmosphere condition.
My program could be rich on the atmosphere condition settings. But still work in
progress.

> BTW can your sky sphere map generator, create a green flash?
>
> https://en.wikipedia.org/wiki/Green_flash
> https://www.youtube.com/watch?v=lwus2nqU0SY
>
The video is so perfect!(maybe with the music)

Green flash is due to air refract, my program can turn on air refract, but have
bugs and still not implement for different wavelength.
>
> --
>
> Regards
>      Stephen


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From: Stephen
Subject: Re: sky light render
Date: 25 Jun 2018 08:38:02
Message: <5b30e22a@news.povray.org>
On 25/06/2018 12:15, And wrote:
> Stephen <mca### [at] aolcom> wrote:
>> On 25/06/2018 07:59, And wrote:
>>> pure sky:
>>>
>>> sun angle 0 degree
>>>
>>
>> I like this but 18 hours render time! What is the resolution of the image?
>>
> 
> Only 720x360
> 
>> If the sun is on the horizon should it not be redder?
>>
> 
> When the sun is on the horizon it can be yellow, red, or invisible, just depend
> on the atmosphere condition.
> My program could be rich on the atmosphere condition settings. But still work in
> progress.
> 

:-)

>> BTW can your sky sphere map generator, create a green flash?
>>
>> https://en.wikipedia.org/wiki/Green_flash
>> https://www.youtube.com/watch?v=lwus2nqU0SY
>>
> The video is so perfect!(maybe with the music)
> 

Also Sprach Zarathustra


> Green flash is due to air refract, my program can turn on air refract, but have
> bugs and still not implement for different wavelength.
>>

It is good work.

-- 

Regards
     Stephen


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