POV-Ray : Newsgroups : povray.binaries.images : media based clouds - in practice Server Time
10 Aug 2024 15:20:46 EDT (-0400)
  media based clouds - in practice (Message 1 to 6 of 6)  
From: Reactor
Subject: media based clouds - in practice
Date: 31 Jul 2004 14:06:45
Message: <410bdfb5@news.povray.org>
Another go using media based clouds.  I am not sure of the render time for
this one as it was a frequently interrupted background task.

In other news, using blob patterns to generate media densities for specific
cloud shapes seems to be working very well, I think I am pretty close to
making decent thunderheads.  Unfortunately the media in pov 3.1 is noticibly
different (especially in render times).  This technique will require much
more fine tuning, but has excellent results and opens the possibility of
making realistic smoke.

              Reactor

PS. Yes, I know the clouds don't quite fit the landscape, I used portions of
another scene that was in progress.


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From: Andrew Wilcox
Subject: Re: media based clouds - in practice
Date: 31 Jul 2004 20:38:05
Message: <410c3b6d@news.povray.org>
Hmmm, look like they fit to me.  Looks like some place I've been but I can't
remember.

AW


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From: Wolfgang Wieser
Subject: Re: media based clouds - in practice
Date: 1 Aug 2004 08:11:50
Message: <410cde06@news.povray.org>
Reactor wrote:
> 
> Another go using media based clouds.  I am not sure of the render time for
> this one as it was a frequently interrupted background task.
> 
Well done! 
This is much better than all media-based clouds I've been able to produce. 
(I then gave up the topic a year ago...)

Could you be a bit more specific on the technique? It seems you are 
using a large hollow sphere (or box) with media inside and the 
density of the media is described by a "blob pattern" (?)

> PS. Yes, I know the clouds don't quite fit the landscape, I used portions
> of another scene that was in progress.
>
Why not... sometimes there's rain in the desert ;)

Wolfgang


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From: Reactor
Subject: Re: media based clouds - in practice
Date: 1 Aug 2004 10:37:13
Message: <410d0019@news.povray.org>
"Wolfgang Wieser" <wwi### [at] nospamgmxde> wrote in message
news:410cde06@news.povray.org...
> Reactor wrote:
> >
> > Another go using media based clouds.  I am not sure of the render time
for
> > this one as it was a frequently interrupted background task.
> >
> Well done!
> This is much better than all media-based clouds I've been able to produce.
> (I then gave up the topic a year ago...)
>
> Could you be a bit more specific on the technique? It seems you are
> using a large hollow sphere (or box) with media inside and the
> density of the media is described by a "blob pattern" (?)
>
> > PS. Yes, I know the clouds don't quite fit the landscape, I used
portions
> > of another scene that was in progress.
> >
> Why not... sometimes there's rain in the desert ;)
>
> Wolfgang
>

These particular clouds actually use the wrinkles pattern.  I am yet to use
the blob pattern sucessfully enough to post here. I intended to use it for
making specifically shaped clouds (especially thunderheads), but the blob
pattern renders very slowly. Please reference my posts "Media based cloud
testing" on Tue, 27 Jul 2004 for description and source.


                 Reactor


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From: Andrew C on Mozilla
Subject: Re: media based clouds - in practice
Date: 1 Aug 2004 10:52:52
Message: <410d03c4$1@news.povray.org>
Very nice... looks real enough to be a photo (well, at this size anyway 
;-)).

Andrew @ home.


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From: Wolfgang Wieser
Subject: Re: media based clouds - in practice
Date: 1 Aug 2004 13:58:35
Message: <410d2f4a@news.povray.org>
Reactor wrote:
> blob pattern renders very slowly. Please reference my posts "Media based
> cloud testing" on Tue, 27 Jul 2004 for description and source.
> 
Thanks for pointing me to that. 
I missed that thread somehow. 

Wolfgang


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