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Hi,
a question: is there any public source code that allows us to create
cloudy surfaces like that one in the attached photo? I want to do
something that I never did before: building cloud cities!
---
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Post a reply to this message
Attachments:
Download 'cloud city.jpg' (50 KB)
Preview of image 'cloud city.jpg'
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Sven Littkowski <I### [at] SvenLittkowski name> wrote:
> Hi,
>
> a question: is there any public source code that allows us to create
> cloudy surfaces like that one in the attached photo? I want to do
> something that I never did before: building cloud cities!
>
>
> ---
> Diese E-Mail wurde von AVG auf Viren geprüft.
> http://www.avg.com
Maybe it can be drawn by media(povray) to some extent. Cycles renderer of
blender should renders better because its volume rendering contains multiple
scattering calculations.
For a thin media like atmosphere, single scattering is in the majority, so
the media of Povray can simulate well. But cloud is heavy media, light
passing through it can scatter many times, most of the luminance from a cloud
is from the multiple scattering.
If you want to draw a cloud in PovRay, maybe scattering media + emission media
can do it, Or ... ?
Or subsurface scattering material, this feature of Povray calculate both single
scattering and multiple scattering in the substance, but scattering density of
the material is limited to constant.
Post a reply to this message
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Am 24.11.2017 um 14:37 schrieb And:
> Sven Littkowski <I### [at] SvenLittkowskiname> wrote:
>> Hi,
>>
>> a question: is there any public source code that allows us to create
>> cloudy surfaces like that one in the attached photo? I want to do
>> something that I never did before: building cloud cities!
>>
>>
>> ---
>> Diese E-Mail wurde von AVG auf Viren geprüft.
>> http://www.avg.com
>
> Maybe it can be drawn by media(povray) to some extent. Cycles renderer of
> blender should renders better because its volume rendering contains multiple
> scattering calculations.
> For a thin media like atmosphere, single scattering is in the majority, so
> the media of Povray can simulate well. But cloud is heavy media, light
> passing through it can scatter many times, most of the luminance from a cloud
> is from the multiple scattering.
>
> If you want to draw a cloud in PovRay, maybe scattering media + emission media
> can do it, Or ... ?
> Or subsurface scattering material, this feature of Povray calculate both single
> scattering and multiple scattering in the substance, but scattering density of
> the material is limited to constant.
I doubt whether subsurface scattering can be employed to do the trick;
you probably won't get the same "fluffyness".
Post a reply to this message
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Sven Littkowski <I### [at] SvenLittkowskiname> wrote:
> Hi,
>
> a question: is there any public source code that allows us to create
> cloudy surfaces like that one in the attached photo? I want to do
> something that I never did before: building cloud cities!
>
>
> ---
> Diese E-Mail wurde von AVG auf Viren geprüft.
> http://www.avg.com
Here is a little example scene for a cloud surface. Not the level like in your
picture but it's something you can start with.
http://news.povray.org/povray.text.scene-files/message/%3Cweb.5a186b419a2a53c19ae32810%40
image:
http://news.povray.org/povray.binaries.images/message/%3Cweb.5a186c9e9a2a53c19ae32810%40
Post a reply to this message
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On 24.11.2017 14:06, Kontemplator wrote:
> Sven Littkowski <I### [at] SvenLittkowskiname> wrote:
>> Hi,
>>
>> a question: is there any public source code that allows us to create
>> cloudy surfaces like that one in the attached photo? I want to do
>> something that I never did before: building cloud cities!
>>
>>
>> ---
>> Diese E-Mail wurde von AVG auf Viren geprüft.
>> http://www.avg.com
>
> Here is a little example scene for a cloud surface. Not the level like in your
> picture but it's something you can start with.
>
>
http://news.povray.org/povray.text.scene-files/message/%3Cweb.5a186b419a2a53c19ae32810%40
>
> image:
>
>
http://news.povray.org/povray.binaries.images/message/%3Cweb.5a186c9e9a2a53c19ae32810%40
>
>
>
Yes, I think I can use those clouds. But I need to get that surface
following the round surface shape of a planet, is that possible?
---
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Le 17-11-24 à 14:57, Sven Littkowski a écrit :
> On 24.11.2017 14:06, Kontemplator wrote:
>> Sven Littkowski <I### [at] SvenLittkowskiname> wrote:
>>> Hi,
>>>
>>> a question: is there any public source code that allows us to create
>>> cloudy surfaces like that one in the attached photo? I want to do
>>> something that I never did before: building cloud cities!
>>>
>>>
>>> ---
>>> Diese E-Mail wurde von AVG auf Viren geprüft.
>>> http://www.avg.com
>>
>> Here is a little example scene for a cloud surface. Not the level like in your
>> picture but it's something you can start with.
>>
>>
http://news.povray.org/povray.text.scene-files/message/%3Cweb.5a186b419a2a53c19ae32810%40
>>
>> image:
>>
>>
http://news.povray.org/povray.binaries.images/message/%3Cweb.5a186c9e9a2a53c19ae32810%40
>>
>>
>>
> Yes, I think I can use those clouds. But I need to get that surface
> following the round surface shape of a planet, is that possible?
>
> ---
> Diese E-Mail wurde von AVG auf Viren geprüft.
> http://www.avg.com
>
Yes. The onion and spherical patterns come to mind.
In your case, I think that onion with a colour_map going from high to
low would be better as you don't need to scale it as much : You can only
take the 10000th repetition
of the pattern if you want.
Next, add some turbulence, possibly adding some other pattern(s).
Don't forget to make your media sufficiently dense.
Post a reply to this message
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clipka <ano### [at] anonymousorg> wrote:
> Am 24.11.2017 um 14:37 schrieb And:
> > Sven Littkowski <I### [at] SvenLittkowskiname> wrote:
> >> Hi,
> >>
> >> a question: is there any public source code that allows us to create
> >> cloudy surfaces like that one in the attached photo? I want to do
> >> something that I never did before: building cloud cities!
> >>
> >>
> >> ---
> >> Diese E-Mail wurde von AVG auf Viren geprüft.
> >> http://www.avg.com
> >
> > Maybe it can be drawn by media(povray) to some extent. Cycles renderer of
> > blender should renders better because its volume rendering contains multiple
> > scattering calculations.
> > For a thin media like atmosphere, single scattering is in the majority, so
> > the media of Povray can simulate well. But cloud is heavy media, light
> > passing through it can scatter many times, most of the luminance from a cloud
> > is from the multiple scattering.
> >
> > If you want to draw a cloud in PovRay, maybe scattering media + emission media
> > can do it, Or ... ?
> > Or subsurface scattering material, this feature of Povray calculate both single
> > scattering and multiple scattering in the substance, but scattering density of
> > the material is limited to constant.
>
> I doubt whether subsurface scattering can be employed to do the trick;
> you probably won't get the same "fluffyness".
Maybe that is partially due to uniform scattering density in a object. However,
I do a test on this, post image here:
http://news.povray.org/povray.binaries.images/thread/%3Cweb.5a186c9e9a2a53c19ae32810%40news.povray.org%3E/?mtop=418940&
moff=10
Post a reply to this message
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"And" <49341109@ntnu.edu.tw> wrote:
> Sven Littkowski <I### [at] SvenLittkowskiname> wrote:
> > Hi,
> >
> > a question: is there any public source code that allows us to create
> > cloudy surfaces like that one in the attached photo? I want to do
> > something that I never did before: building cloud cities!
> >
> >
> > ---
> > Diese E-Mail wurde von AVG auf Viren geprüft.
> > http://www.avg.com
>
> Maybe it can be drawn by media(povray) to some extent. Cycles renderer of
> blender should renders better because its volume rendering contains multiple
> scattering calculations.
> For a thin media like atmosphere, single scattering is in the majority, so
> the media of Povray can simulate well. But cloud is heavy media, light
> passing through it can scatter many times, most of the luminance from a cloud
> is from the multiple scattering.
>
> If you want to draw a cloud in PovRay, maybe scattering media + emission media
> can do it, Or ... ?
> Or subsurface scattering material, this feature of Povray calculate both single
> scattering and multiple scattering in the substance, but scattering density of
> the material is limited to constant.
I uploaded two images:
http://news.povray.org/povray.binaries.images/message/%3Cweb.5a1917549a2a53c1a6394f050%40news.povray.org%3E/#%3Cweb.5a1
917549a2a53c1a6394f050%40news.povray.org%3E
and
http://news.povray.org/povray.binaries.images/message/%3Cweb.5a191dbf9a2a53c1a6394f050%40news.povray.org%3E/#%3Cweb.5a1
91dbf9a2a53c1a6394f050%40news.povray.org%3E
Post a reply to this message
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On 25.11.2017 02:53, And wrote:
> I uploaded two images:
> http://news.povray.org/povray.binaries.images/message/%3Cweb.5a1917549a2a
53c1a6394f050%40news.povray.org%3E/#%3Cweb.5a1
> 917549a2a53c1a6394f050%40news.povray.org%3E
> and
> http://news.povray.org/povray.binaries.images/message/%3Cweb.5a191dbf9a2a
53c1a6394f050%40news.povray.org%3E/#%3Cweb.5a1
> 91dbf9a2a53c1a6394f050%40news.povray.org%3E
Yes, I saw them. I actually responded to the IMAGES group thread. :-)
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Is there a German offline HELP file for POV-Ray? The English version is,
due to its many English special terms, not so easy for me to understand.
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Am 26.11.2017 um 04:27 schrieb Sven Littkowski:
> Is there a German offline HELP file for POV-Ray? The English version is,
> due to its many English special terms, not so easy for me to understand.
Not that I know of. And if such a thing exists, I'd expect it to be
horribly outdated.
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On 26.11.2017 06:15, clipka wrote:
> Not that I know of. And if such a thing exists, I'd expect it to be
> horribly outdated.
Thanks. Well, that is why I am so hard to understand and to learn - too
many special terms in English that I cannot translate right away into
German.
If the community has not enough Germans and time to translate, maybe
through a go-fund-me a paid translator? And not just for German, but for
some more key languages. This would be my suggestion.
I wouldn't even mind to do this on my own, but living in Jamaica, such
pages disable members to raise funds who live in countries of the Third
World. :-(
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Sven, It's 2017.
Google translate, search terms "german word for ..." "ein anderes wort fur`..."
I do it all the time.
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Le 17-11-26 à 19:30, Bald Eagle a écrit :
> Sven, It's 2017.
>
> Google translate, search terms "german word for ..." "ein anderes wort fur`..."
>
> I do it all the time.
>
>
Over time, it get better and better. There are so many peoples that
translate stuff and enter the corrections if they find any error.
You can copy-paste whole documents and have them translated. You can
also enter a link, like that of the online documentation, and have the
whole document translated.
You can then save it somewhere convenient for you.
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Well, the problem I have is, that the permanent searching for this and
searching for that totally takes me out of concentration in
understanding the POV-Ray instructions. :-(
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On 28-11-2017 0:56, Sven Littkowski wrote:
> Well, the problem I have is, that the permanent searching for this and
> searching for that totally takes me out of concentration in
> understanding the POV-Ray instructions. :-(
>
Take it one step at a time. If you have a particular topic you want to
explore, take the time to make a complete translation as indicated
above, and only after that concentrate on the POV-Ray problem. No need
to do everything at once in life. To be discouraged.
--
Thomas
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On 28.11.2017 02:44, Thomas de Groot wrote:
> Take it one step at a time. If you have a particular topic you want to
> explore, take the time to make a complete translation as indicated
> above, and only after that concentrate on the POV-Ray problem. No need
> to do everything at once in life. To be discouraged.
Advise taken. But I wished I always had that time. :-)
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On 28-11-2017 12:32, Sven Littkowski wrote:
> On 28.11.2017 02:44, Thomas de Groot wrote:
>> Take it one step at a time. If you have a particular topic you want to
>> explore, take the time to make a complete translation as indicated
>> above, and only after that concentrate on the POV-Ray problem. No need
>> to do everything at once in life. To be discouraged.
>
> Advise taken. But I wished I always had that time. :-)
>
Aaah, Time! Indeed. And yet, it may seem paradoxical, but the more time
you take initially, the more you achieve in the end.
--
Thomas
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On 28.11.2017 07:23, Thomas de Groot wrote:
> Aaah, Time! Indeed. And yet, it may seem paradoxical, but the more time
> you take initially, the more you achieve in the end.
Yes, I know. But hard to make more time, my days are more than filled, I
am a multi-tasking person:
- writing SciFi novels
- reconstructing ancient Roman ships digitally (maritime archaeology)
- software development
- websites
- online databases
- online streaming
- IT consulting to companies
- graphic design
- orchid farming
- cross-breeding of plants (creating hybrids)
Time is a treasure. :-)
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On 28-11-2017 19:01, Sven Littkowski wrote:
> On 28.11.2017 07:23, Thomas de Groot wrote:
>> Aaah, Time! Indeed. And yet, it may seem paradoxical, but the more time
>> you take initially, the more you achieve in the end.
> Yes, I know. But hard to make more time, my days are more than filled, I
> am a multi-tasking person:
> - writing SciFi novels
> - reconstructing ancient Roman ships digitally (maritime archaeology)
> - software development
> - websites
> - online databases
> - online streaming
> - IT consulting to companies
> - graphic design
> - orchid farming
> - cross-breeding of plants (creating hybrids)
>
> Time is a treasure. :-)
>
Hmmm... Typical how you mix job(s) and hobby(s) together in your list
;-) I am sure not everything has the save urgency... Priorities are also
what Time is about.
--
Thomas
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On 29-11-2017 8:45, Thomas de Groot wrote:
> ....
> I am sure not everything has the save urgency...
>
Read this as: the /same/ urgency...
--
Thomas
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On 29.11.2017 03:05, Thomas de Groot wrote:
> On 29-11-2017 8:45, Thomas de Groot wrote:
>> .... I am sure not everything has the save urgency...
>
> Read this as: the /same/ urgency...
:-)
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