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From: Jim Kress
Subject: Oblivious to transparency
Date: 25 Jul 2002 22:28:50
Message: <3d40b3e2@news.povray.org>
I can't stop myself ...


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Attachments:
Download 'oblivious_to_transparency.gif' (94 KB)

Preview of image 'oblivious_to_transparency.gif'
oblivious_to_transparency.gif


 

From: Sir Charles W  Shults III
Subject: Re: Oblivious to transparency
Date: 25 Jul 2002 22:31:25
Message: <3d40b47d$1@news.povray.org>
I have a tree that grows those in my yard, I think.

Cheers!

Chip Shults
My robotics, space and CGI web page - http://home.cfl.rr.com/aichip


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From: Francois Labreque
Subject: Re: Oblivious to transparency
Date: 25 Jul 2002 22:52:40
Message: <3D40B8DC.8000306@videotron.ca>
Jim Kress wrote:
> I can't stop myself ...
> 

Don't.

P.S.:  You might want to use anti-aliasing.
-- 
/*Francois Labreque*/#local a=x+y;#local b=x+a;#local c=a+b;#macro P(F//
/*    flabreque    */L)polygon{5,F,F+z,L+z,L,F pigment{rgb 9}}#end union
/*        @        */{P(0,a)P(a,b)P(b,c)P(2*a,2*b)P(2*b,b+c)P(b+c,<2,3>)
/*   videotron.ca  */}camera{orthographic location<6,1.25,-6>look_at a }


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From: Jim Kress
Subject: Re: Oblivious to transparency
Date: 25 Jul 2002 22:58:35
Message: <3d40badb$1@news.povray.org>
> Don't.
>
Thanks.

> P.S.:  You might want to use anti-aliasing.
>
I tried that and found that the rendering quality did not improve (but the
time to render sure increased).

Thanks for the suggestion, though.

Jim


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From: Rafal 'Raf256' Maj
Subject: Re: Oblivious to transparency
Date: 25 Jul 2002 23:13:42
Message: <Xns92573499665CCraf256com@204.213.191.226>
"Jim Kress" <nos### [at] kressworkscom> wrote in
news:3d40badb$1@news.povray.org 

>> Don't.
>>
> Thanks.
> 
>> P.S.:  You might want to use anti-aliasing.
>>
> I tried that and found that the rendering quality did not improve (but
> the time to render sure increased).

I'm going to bed right now - post sources in next 15-30 mins to 
pov### [at] raf256com and You will have 5 h on Athlon 1,7 :)

-- 
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M


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From: Rafal 'Raf256' Maj
Subject: Re: Oblivious to transparency
Date: 25 Jul 2002 23:15:37
Message: <Xns925734ECA7203raf256com@204.213.191.226>
"Jim Kress" <nos### [at] kressworkscom> wrote in 
news:3d40badb$1@news.povray.org

> From: "Jim Kress" <nos### [at] kressworkscom>

...hmm what's Your email ?

-- 
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M


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From: Alf Peake
Subject: Re: Oblivious to transparency
Date: 26 Jul 2002 10:59:06
Message: <3d4163ba@news.povray.org>
"Jim Kress" <nos### [at] kressworkscom> wrote in message
news:3d40b3e2@news.povray.org...
> I can't stop myself ...

You're very proud of this object, are you not? ;)

I like. Please don't stop.

Alf


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From: Jim Kress
Subject: Re: Oblivious to transparency
Date: 26 Jul 2002 12:03:04
Message: <3d4172b8$1@news.povray.org>
> You're very proud of this object, are you not? ;)
>
It turned out pretty good so yes, I like it.

> I like. Please don't stop.
>
Thanks.

Jim


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From: Christopher James Huff
Subject: Re: Oblivious to transparency
Date: 26 Jul 2002 12:49:46
Message: <chrishuff-FD9AF2.11423226072002@netplex.aussie.org>
In article <3d40b3e2@news.povray.org>,
 "Jim Kress" <nos### [at] kressworkscom> wrote:

> I can't stop myself ...
> 
> begin 666 oblivious_to_transparency.gif
> [Image]
> 
> end

Why are you using the GIF format?
GIF is limited to 256 colors (the dithering is visible on this image) 
and doesn't compress very well. This file is 96KB, using PNG I was able 
to get it down to 76KB, using JPEG I got it down to less than 15KB 
without obvious artifacts. PNG would probably have been bigger given the 
original image, but it wouldn't have had the dithering, or you could 
have reduced it to 8 bit and just gotten the file size advantage. JPEG 
would probably have gotten better compression if it had the original 
image to work with, and wouldn't have the ugly dithering.

-- 
Christopher James Huff <chr### [at] maccom>
POV-Ray TAG e-mail: chr### [at] tagpovrayorg
TAG web site: http://tag.povray.org/


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From: Jim Kress
Subject: Re: Oblivious to transparency
Date: 26 Jul 2002 14:11:15
Message: <3d4190c3$1@news.povray.org>
> Why are you using the GIF format?

Actually, that's a good question.  Probably arises from the fact that the
images will be posted in the Art and Research Sections of my web site and
I'm just used to doing them in GIF format.  I also tend to post images on
the Research side with transparency and PNG transparency support is qute
limited in all the browsers, I've avoided PNG.

However (end of my babbling) you have a good point.  I'll repost with PNG
here.

Thanks for the comments!

Jim


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