POV-Ray : Newsgroups : povray.binaries.images : Glass sphere with bubbles (146kb) Server Time
16 Nov 2024 00:22:25 EST (-0500)
  Glass sphere with bubbles (146kb) (Message 1 to 5 of 5)  
From: Daniel Nilsson
Subject: Glass sphere with bubbles (146kb)
Date: 25 Mar 2003 11:37:05
Message: <3e8085b1@news.povray.org>
Now the big (1280x1024) render of my glass sphere with bubbles are finished.
It took about 5d 12h...
The image is postprocessed to remove the ugly effects of the dispersion bug
(see my post "Despersion bug?" from 2003-03-21). It seems that the bug is
only in the red channel so I just removed all red from the sphere (cyan
glass looks good, but it was supposed to be clear).

--
Daniel Nilsson


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Attachments:
Download 'test08-1280x1024-postprocessed.jpg' (147 KB)

Preview of image 'test08-1280x1024-postprocessed.jpg'
test08-1280x1024-postprocessed.jpg


 

From: Apache
Subject: Re: Glass sphere with bubbles (146kb)
Date: 25 Mar 2003 12:51:02
Message: <3e809706$1@news.povray.org>
You could base the red channel on the others and get the sphere clear again?


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From: Greg Edwards
Subject: Re: Glass sphere with bubbles (146kb)
Date: 25 Mar 2003 22:01:37
Message: <tzqzr1bw6g2a$.l04iqu2ssokn$.dlg@40tude.net>
On Tue, 25 Mar 2003 18:50:55 +0100, Apache wrote:

> You could base the red channel on the others and get the sphere clear again?

Wouldn't that kill the dispersion effect? The red channel is supposed to be 
different. Maybe download and recompile the POV source (if you have a C++ 
compiler handy) but beware of possible conserve_energy bugs! (or maybe it's 
just me...)

-- 
light_source#macro G(E)sphere{z+E*y*5e-3.04rotate-z*E*6pigment{rgbt#end{
20*y-10#local n=162;1}#while(n)#local n=n-.3;G(n)x}}G(-n).7}}#end//GregE


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From: Daniel Nilsson
Subject: Re: Glass sphere with bubbles (146kb)
Date: 26 Mar 2003 06:37:28
Message: <3e8190f8$1@news.povray.org>
"Greg Edwards" <edw### [at] hotmailcomremovethis> wrote in message
news:tzqzr1bw6g2a$.l04iqu2ssokn$.dlg@40tude.net...
> On Tue, 25 Mar 2003 18:50:55 +0100, Apache wrote:
>
> > You could base the red channel on the others and get the sphere clear
again?
>
> Wouldn't that kill the dispersion effect? The red channel is supposed to
be
> different. Maybe download and recompile the POV source (if you have a C++
> compiler handy) but beware of possible conserve_energy bugs! (or maybe
it's
> just me...)

I have a MSVC compiled version now, but that still shows some strange
things, see "Bug with dispersion" in povray.general.
What is the conserve_energy bug you are talking about?

--
Daniel Nilsson


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From: Greg Edwards
Subject: Re: Glass sphere with bubbles (146kb)
Date: 27 Mar 2003 14:50:33
Message: <1760zi7mjluu9$.171de0q16u8ma$.dlg@40tude.net>
On Wed, 26 Mar 2003 12:38:23 +0100, Daniel Nilsson wrote:

> "Greg Edwards" <edw### [at] hotmailcomremovethis> wrote in message
> news:tzqzr1bw6g2a$.l04iqu2ssokn$.dlg@40tude.net...
>> On Tue, 25 Mar 2003 18:50:55 +0100, Apache wrote:
>>
>>> You could base the red channel on the others and get the sphere clear
> again?
>>
>> Wouldn't that kill the dispersion effect? The red channel is supposed to
> be
>> different. Maybe download and recompile the POV source (if you have a C++
>> compiler handy) but beware of possible conserve_energy bugs! (or maybe
> it's
>> just me...)
> 
> I have a MSVC compiled version now, but that still shows some strange
> things, see "Bug with dispersion" in povray.general.
> What is the conserve_energy bug you are talking about?

I don't have an unmodified source tree handy right now but (at least in my 
patch) there's some issues with internal reflection. It could possibly just 
be my patch though...

-- 
light_source#macro G(E)sphere{z+E*y*5e-3.04rotate-z*E*6pigment{rgbt#end{
20*y-10#local n=162;1}#while(n)#local n=n-.3;G(n)x}}G(-n).7}}#end//GregE


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