"Sven Littkowski" <Sve### [at] Jamaica-Focuscom> wrote:
> Bill, I would join making a number of test renders with clouds. Can you
> provide me a link to that cloud macro, or the source code? I would
> appreciate this a lot! I would also like to know the parameters you're
> using. Thanks!

It's still very much a wip at the moment, but I'd be happy to post source code
when it's more complete.
:)

Post a reply to this message

> "Sven Littkowski" <Sve### [at] Jamaica-Focuscom> wrote:
>> Bill, I would join making a number of test renders with clouds. Can you
>> provide me a link to that cloud macro, or the source code? I would
>> appreciate this a lot! I would also like to know the parameters you're
>> using. Thanks!
>
> It's still very much a wip at the moment, but I'd be happy to post source 
> code when it's more complete.
>  :)

When ? ;o)

seriously, i'm so eager to try your macro.

-- 
A+
Ferdinand
http://lymbe.free.fr/index.htm

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Le Sun, 19 Apr 2009 23:20:47 +0200, Bill Pragnell  


> Tricky things, clouds. All my previous experiments with media clouds  
> have been
> slow, unrealistic, and fiddly. Gilles' df3 technique is sly, and his  
> example
> images beautiful. However, I've always wanted a cloud macro that will  
> 'just
> work' in a scene, without the need for external tools and without the  
> memory
> consumption of hi-res df3s.
>
> This image is a decent result from a set of macros I've recently been  
> developing
> - it rendered in ~30 mins on my 1.8GHz macbook, which I think is very  
> good for
> 'pure' object-pattern-based media (this is without aa - unfortunately it  
> takes
> a lot longer with aa).
>
> Using a blob as the pattern template makes the rendering much quicker,  
> and
> lowering the media aa_level is also a great speedup I'd never tried  
> before. My
> basic cloud macro currently has 11 parameters, which sounds like a lot,  
> but this
> includes location and size, turbulence, solidity and so on, which makes  
> tweaking
> a lot easier. I've also got a quality parameter, the lowest setting of  
> which
> just uses the solid blob objects - very handy for shape and location  
> checks
> (and also looks pretty surreal!).
>
> Anyway, this is a wip so I'll post more interesting results as I get  
> them...


Hello POVers.

Perhaps some people here will remember me. It's a loooong time I was not  
present among the POV community. Real life took me away from you (sigh...)  
for months and from my POV-related projects. The main project is still  
alive and is called TerraPOV. It deals with landscape scenes, inspired by  
Terragen, and I was mainly focusing on atmosphere and cloudscapes, which  
is a difficult exercise if you want to have quite-realistic results. I had  
some encouraging renders. I came back on POV forums and to TerraPOV  
recently. My new machine (overclocked Q6600) allows a step forward. I feel  
like I can say something on this thread about clouds.


TerraPOV has 3 major dimensions:

     1) Atmospheres & cloudscapes/single could
     2) Terrain generation/texturing
     3) Preview & other user-friendly features

I also remember that I promessed you a tutorial for the principles ruling  
TerraPOV's atmophere & clouscape system. I will keep my promess soon.

Here are a few things I can get, among them is the last render I got last  
night (atmo_demo5bis.png and atmo_demo5ter.png), based on a previous test  
scene, but with higher settings. The problem I have now is to find a  
solution for multi-layer cloudscapes because monte-carlo integration can  
only be in a single container. Until now, cloud layers are contained  
within spherical shells. I am currently trying to find a way to have  
multiple layers (2 or 3 are enough for most cases) within a single shell  
container without setting too many intervals or samples for the media.

The last picture 'atmo_demo5ter.png' is the same as 'atmo_demo5bis' shows  
what can happen with 2 layers, which is more visible at low elevations  
(resp 3deg and 18deg). The bottom layer is dark because integration only  
occurs within the shell and does not take into account what happens above.  
You can see that the top layer bahaves as It could be expected.


I am very happy to be back, and I sincerely hope I can get regular  
availability and time here. It is always a nice pleasure to be with people  
around here.


Bruno

-- 

http://www.opera.com/mail/

Post a reply to this message

Attachments:
Download 'atmo_demo5bis.png' (405 KB) Download 'sky_21.png' (234 KB) Download 'sky_23_2.png' (350 KB) Download 'atmo_demo5ter.png' (299 KB)

Preview of image 'atmo_demo5bis.png'

Preview of image 'sky_21.png'

Preview of image 'sky_23_2.png'

Preview of image 'atmo_demo5ter.png'

Welcome back indeed, Bruno!!

Waiting eagerly for new developments of TerraPOV.

Thomas

Post a reply to this message

"Bruno Cabasson" <bru### [at] cabassoncom> wrote:
> Hello POVers.
>
> Perhaps some people here will remember me. It's a loooong time I was not
> present among the POV community. Real life took me away from you (sigh...)
> for months and from my POV-related projects. The main project is still
> alive and is called TerraPOV. It deals with landscape scenes, inspired by
> Terragen, and I was mainly focusing on atmosphere and cloudscapes, which
> is a difficult exercise if you want to have quite-realistic results. I had
> some encouraging renders. I came back on POV forums and to TerraPOV
> recently. My new machine (overclocked Q6600) allows a step forward. I feel
> like I can say something on this thread about clouds.
>
>
> TerraPOV has 3 major dimensions:
>
>      1) Atmospheres & cloudscapes/single could
>      2) Terrain generation/texturing
>      3) Preview & other user-friendly features
>
> I also remember that I promessed you a tutorial for the principles ruling
> TerraPOV's atmophere & clouscape system. I will keep my promess soon.
>
> Here are a few things I can get, among them is the last render I got last
> night (atmo_demo5bis.png and atmo_demo5ter.png), based on a previous test
> scene, but with higher settings. The problem I have now is to find a
> solution for multi-layer cloudscapes because monte-carlo integration can
> only be in a single container. Until now, cloud layers are contained
> within spherical shells. I am currently trying to find a way to have
> multiple layers (2 or 3 are enough for most cases) within a single shell
> container without setting too many intervals or samples for the media.
>
> The last picture 'atmo_demo5ter.png' is the same as 'atmo_demo5bis' shows
> what can happen with 2 layers, which is more visible at low elevations
> (resp 3deg and 18deg). The bottom layer is dark because integration only
> occurs within the shell and does not take into account what happens above.
> You can see that the top layer bahaves as It could be expected.
>
> I am very happy to be back, and I sincerely hope I can get regular
> availability and time here. It is always a nice pleasure to be with people
> around here.
>
> Bruno
>
> --

> http://www.opera.com/mail/

Magnificent clouds.
I prefer the sky_23_2 for its romantic atmosphere.
Alors, bienvenue!

:-)

--
Carlo

Post a reply to this message

Le Thu, 30 Apr 2009 09:37:26 +0200, Thomas de Groot  


> Welcome back indeed, Bruno!!
>
> Waiting eagerly for new developments of TerraPOV.
>
> Thomas
>
>

Thank you Thomas. Normally, I am on vacation next week and I plan to start  
writing my articles about atmosphere and cloudscape. It's spring now (if  
ever it stops raining in France all the time ...), and I can be busy at  
urgent gardening. But I'll try my best.


My best.


     Bruno.

-- 

http://www.opera.com/mail/

Post a reply to this message

> "Bruno Cabasson" <bru### [at] cabassoncom> wrote:
>> Hello POVers.
>>
>> Perhaps some people here will remember me. It's a loooong time I was not
>> present among the POV community. Real life took me away from you  
>> (sigh...)
>> for months and from my POV-related projects. The main project is still
>> alive and is called TerraPOV. It deals with landscape scenes, inspired  
>> by
>> Terragen, and I was mainly focusing on atmosphere and cloudscapes, which
>> is a difficult exercise if you want to have quite-realistic results. I  
>> had
>> some encouraging renders. I came back on POV forums and to TerraPOV
>> recently. My new machine (overclocked Q6600) allows a step forward. I  
>> feel
>> like I can say something on this thread about clouds.
>>
>>
>> TerraPOV has 3 major dimensions:
>>
>>      1) Atmospheres & cloudscapes/single could
>>      2) Terrain generation/texturing
>>      3) Preview & other user-friendly features
>>
>> I also remember that I promessed you a tutorial for the principles  
>> ruling
>> TerraPOV's atmophere & clouscape system. I will keep my promess soon.
>>
>> Here are a few things I can get, among them is the last render I got  
>> last
>> night (atmo_demo5bis.png and atmo_demo5ter.png), based on a previous  
>> test
>> scene, but with higher settings. The problem I have now is to find a
>> solution for multi-layer cloudscapes because monte-carlo integration can
>> only be in a single container. Until now, cloud layers are contained
>> within spherical shells. I am currently trying to find a way to have
>> multiple layers (2 or 3 are enough for most cases) within a single shell
>> container without setting too many intervals or samples for the media.
>>
>> The last picture 'atmo_demo5ter.png' is the same as 'atmo_demo5bis'  
>> shows
>> what can happen with 2 layers, which is more visible at low elevations
>> (resp 3deg and 18deg). The bottom layer is dark because integration only
>> occurs within the shell and does not take into account what happens  
>> above.
>> You can see that the top layer bahaves as It could be expected.
>>
>> I am very happy to be back, and I sincerely hope I can get regular
>> availability and time here. It is always a nice pleasure to be with  
>> people
>> around here.
>>
>> Bruno
>>
>> --

>> http://www.opera.com/mail/
>
> Magnificent clouds.
> I prefer the sky_23_2 for its romantic atmosphere.
> Alors, bienvenue!
>
> :-)
>
> --
> Carlo
>
>

Thanks Carlo. See you ...


    Bruno.

-- 

http://www.opera.com/mail/

Post a reply to this message

"Thomas de Groot" <tDOTdegroot@interDOTnlANOTHERDOTnet> wrote:
> Welcome back indeed, Bruno!!
>
> Waiting eagerly for new developments of TerraPOV.
>
> Thomas

I wrote the first 4 articles in povray.binaries.tutorials. If you're still
interested... Further articles coming soon.

Bruno

Post a reply to this message

Keep up the good work!

It would be nice if this could be incorporated into my nxplanets planet 
creator (on the Pov-Ray object collection) or something similar.   =]

Does you system hide stars in daytime and show them at night?

-Nekar Xenos



"Bruno Cabasson" <bru### [at] cabassoncom> wrote in message 
news:op.us5o01drm1sclq@pignouf...
> Le Sun, 19 Apr 2009 23:20:47 +0200, Bill Pragnell

>
>> Tricky things, clouds. All my previous experiments with media clouds
>> have been
>> slow, unrealistic, and fiddly. Gilles' df3 technique is sly, and his
>> example
>> images beautiful. However, I've always wanted a cloud macro that will
>> 'just
>> work' in a scene, without the need for external tools and without the
>> memory
>> consumption of hi-res df3s.
>>
>> This image is a decent result from a set of macros I've recently been
>> developing
>> - it rendered in ~30 mins on my 1.8GHz macbook, which I think is very
>> good for
>> 'pure' object-pattern-based media (this is without aa - unfortunately it
>> takes
>> a lot longer with aa).
>>
>> Using a blob as the pattern template makes the rendering much quicker,
>> and
>> lowering the media aa_level is also a great speedup I'd never tried
>> before. My
>> basic cloud macro currently has 11 parameters, which sounds like a lot,
>> but this
>> includes location and size, turbulence, solidity and so on, which makes
>> tweaking
>> a lot easier. I've also got a quality parameter, the lowest setting of
>> which
>> just uses the solid blob objects - very handy for shape and location
>> checks
>> (and also looks pretty surreal!).
>>
>> Anyway, this is a wip so I'll post more interesting results as I get
>> them...
>
>
> Hello POVers.
>
> Perhaps some people here will remember me. It's a loooong time I was not
> present among the POV community. Real life took me away from you (sigh...)
> for months and from my POV-related projects. The main project is still
> alive and is called TerraPOV. It deals with landscape scenes, inspired by
> Terragen, and I was mainly focusing on atmosphere and cloudscapes, which
> is a difficult exercise if you want to have quite-realistic results. I had
> some encouraging renders. I came back on POV forums and to TerraPOV
> recently. My new machine (overclocked Q6600) allows a step forward. I feel
> like I can say something on this thread about clouds.
>
>
> TerraPOV has 3 major dimensions:
>
>     1) Atmospheres & cloudscapes/single could
>     2) Terrain generation/texturing
>     3) Preview & other user-friendly features
>
> I also remember that I promessed you a tutorial for the principles ruling
> TerraPOV's atmophere & clouscape system. I will keep my promess soon.
>
> Here are a few things I can get, among them is the last render I got last
> night (atmo_demo5bis.png and atmo_demo5ter.png), based on a previous test
> scene, but with higher settings. The problem I have now is to find a
> solution for multi-layer cloudscapes because monte-carlo integration can
> only be in a single container. Until now, cloud layers are contained
> within spherical shells. I am currently trying to find a way to have
> multiple layers (2 or 3 are enough for most cases) within a single shell
> container without setting too many intervals or samples for the media.
>
> The last picture 'atmo_demo5ter.png' is the same as 'atmo_demo5bis' shows
> what can happen with 2 layers, which is more visible at low elevations
> (resp 3deg and 18deg). The bottom layer is dark because integration only
> occurs within the shell and does not take into account what happens above.
> You can see that the top layer bahaves as It could be expected.
>
>
> I am very happy to be back, and I sincerely hope I can get regular
> availability and time here. It is always a nice pleasure to be with people
> around here.
>
>
> Bruno
>
> -- 

> http://www.opera.com/mail/

Post a reply to this message

Le Sun, 17 May 2009 15:07:40 +0200, Nekar Xenos <nek### [at] gmailcom> a  


> Keep up the good work!
>
> It would be nice if this could be incorporated into my nxplanets planet  
> creator (on the Pov-Ray object collection) or something similar.   =]
>
> Does you system hide stars in daytime and show them at night?
>
> -Nekar Xenos
>
>
>
> "Bruno Cabasson" <bru### [at] cabassoncom> wrote in message  
> news:op.us5o01drm1sclq@pignouf...
>> Le Sun, 19 Apr 2009 23:20:47 +0200, Bill Pragnell

>>
>>> Tricky things, clouds. All my previous experiments with media clouds
>>> have been
>>> slow, unrealistic, and fiddly. Gilles' df3 technique is sly, and his
>>> example
>>> images beautiful. However, I've always wanted a cloud macro that will
>>> 'just
>>> work' in a scene, without the need for external tools and without the
>>> memory
>>> consumption of hi-res df3s.
>>>
>>> This image is a decent result from a set of macros I've recently been
>>> developing
>>> - it rendered in ~30 mins on my 1.8GHz macbook, which I think is very
>>> good for
>>> 'pure' object-pattern-based media (this is without aa - unfortunately  
>>> it
>>> takes
>>> a lot longer with aa).
>>>
>>> Using a blob as the pattern template makes the rendering much quicker,
>>> and
>>> lowering the media aa_level is also a great speedup I'd never tried
>>> before. My
>>> basic cloud macro currently has 11 parameters, which sounds like a lot,
>>> but this
>>> includes location and size, turbulence, solidity and so on, which makes
>>> tweaking
>>> a lot easier. I've also got a quality parameter, the lowest setting of
>>> which
>>> just uses the solid blob objects - very handy for shape and location
>>> checks
>>> (and also looks pretty surreal!).
>>>
>>> Anyway, this is a wip so I'll post more interesting results as I get
>>> them...
>>
>>
>> Hello POVers.
>>
>> Perhaps some people here will remember me. It's a loooong time I was not
>> present among the POV community. Real life took me away from you  
>> (sigh...)
>> for months and from my POV-related projects. The main project is still
>> alive and is called TerraPOV. It deals with landscape scenes, inspired  
>> by
>> Terragen, and I was mainly focusing on atmosphere and cloudscapes, which
>> is a difficult exercise if you want to have quite-realistic results. I  
>> had
>> some encouraging renders. I came back on POV forums and to TerraPOV
>> recently. My new machine (overclocked Q6600) allows a step forward. I  
>> feel
>> like I can say something on this thread about clouds.
>>
>>
>> TerraPOV has 3 major dimensions:
>>
>>     1) Atmospheres & cloudscapes/single could
>>     2) Terrain generation/texturing
>>     3) Preview & other user-friendly features
>>
>> I also remember that I promessed you a tutorial for the principles  
>> ruling
>> TerraPOV's atmophere & clouscape system. I will keep my promess soon.
>>
>> Here are a few things I can get, among them is the last render I got  
>> last
>> night (atmo_demo5bis.png and atmo_demo5ter.png), based on a previous  
>> test
>> scene, but with higher settings. The problem I have now is to find a
>> solution for multi-layer cloudscapes because monte-carlo integration can
>> only be in a single container. Until now, cloud layers are contained
>> within spherical shells. I am currently trying to find a way to have
>> multiple layers (2 or 3 are enough for most cases) within a single shell
>> container without setting too many intervals or samples for the media.
>>
>> The last picture 'atmo_demo5ter.png' is the same as 'atmo_demo5bis'  
>> shows
>> what can happen with 2 layers, which is more visible at low elevations
>> (resp 3deg and 18deg). The bottom layer is dark because integration only
>> occurs within the shell and does not take into account what happens  
>> above.
>> You can see that the top layer bahaves as It could be expected.
>>
>>
>> I am very happy to be back, and I sincerely hope I can get regular
>> availability and time here. It is always a nice pleasure to be with  
>> people
>> around here.
>>
>>
>> Bruno
>>

>> http://www.opera.com/mail/
>

Considering stars can be an interresting feature for TerraPOV. I'll keep  
it in mind. How I see this at first sight: Their very low lightness can be  
taken into account, making them invisible (negligible contribution, as in  
normal life). In TerraPOV, when the sun is low - near or below horizon -  
the scene gets darker. A brightness parameter compensates this in order to  
have sufficient illumination. This factor can be applied to the brightness  
of stars that will then appear automatically (provided at least one ray  
intercepts the object or whatever represents the star).

Next TerraPOV article is being prepared and nearly ready. I hope I can  
post it tomorrow.

Bruno

-- 

http://www.opera.com/mail/

Post a reply to this message