POV-Ray : Newsgroups : povray.binaries.images : Comparison between blinn and specular Server Time
3 Oct 2024 13:20:43 EDT (-0400)
  Comparison between blinn and specular (Message 11 to 18 of 18)  
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From: Peter Warren
Subject: Re: Not blinned (yet) [~45KB]
Date: 3 Feb 2000 06:35:32
Message: <38996804@news.povray.org>
Bob Hughes wrote in message <38995dae@news.povray.org>...
>Here's a couple "crushed velvet" pictures that can be done in POV-Ray 3.0*,
>thanks to some people at AOL with plenty of helpful ideas.  Maybe not
perfect
>but it's faked okay imo  :-)


The red looks good.
The blue just looks like some twisted crackle. I see no velvet.

Thanks for this post,

Peter Warren
war### [at] hotmailcom


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From: Bob Hughes
Subject: Re: Now blinned [~38KB]
Date: 3 Feb 2000 09:35:47
Message: <38999243@news.povray.org>
"Peter Warren" <int### [at] halcyoncom> wrote in message
news:38996804@news.povray.org...
| The red looks good.
| The blue just looks like some twisted crackle. I see no velvet.

Thanks and yw too.
  Yeah I know.  I thought it looked like crinkled plastic tarp or something
similar.  It's probably because of the height field being so lumpy.  I've tried
the texture on a smoother hf; and now with no phong or specular and only the
blinn.  Highlights contribute little to this though.  Most of what you see as
what appears to be highlight is due to the negative 'brilliance' instead.
Anyway you still have to use your imagination to begin to see velvet texture,
even then it's like most anything else in that each person will only see things
their way.
  Here's another pair of renders.  Helpful hint: the letters are raised relief.

Bob


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Attachments:
Download 'newvelv.jpg' (28 KB)

Preview of image 'newvelv.jpg'
newvelv.jpg


 

From: David Fontaine
Subject: Re: Now blinned [~38KB]
Date: 3 Feb 2000 17:44:59
Message: <389A04B0.20FB3FC5@faricy.net>
Both the red pics look quite realistic I think.

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From: Peter Warren
Subject: Re: Not blinned (yet) [~45KB]
Date: 4 Feb 2000 00:37:04
Message: <389a6580@news.povray.org>
I think the red one here looks a little plastic
 and the black one is right on.

Nonetheless really nice work, IMNSHO.

Peter Warren
war### [at] hotmailcom


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From: Steve
Subject: Re: blinn25KB_BU
Date: 6 Feb 2000 21:56:49
Message: <slrn89s9u0.10t.sjlen@zero-pps.localdomain>
On Wed, 2 Feb 2000 19:30:48 -0800, Peter Warren <int### [at] halcyoncom> wrote:
>To answer the question I think the difference is
>very noticeable.
>
>Please allow me this small digression.
>The textural quality of the blinn image
>struck me as similar to the shader
>SHW_velvet (by Stephen H. Westin).
>
>Attached is an image using this shader.
>(Made with BMRT a great, but IMNSHO,
> too complex for the average person
> program.)

Most people I know can't program their VCR,
so what do you call average?

The image and example is very interesting. 

Is BMRT still alive and kicking? 

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Cheers
Steve              email mailto:sjl### [at] ndirectcouk

%HAV-A-NICEDAY Error not enough coffee  0 pps. 

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From: Steve
Subject: Re: Not blinned (yet) [~45KB]
Date: 6 Feb 2000 21:56:50
Message: <slrn89sa6h.10t.sjlen@zero-pps.localdomain>
On Thu, 3 Feb 2000 04:50:35 -0600, Bob Hughes 
<omn### [at] hotmailcom?subject=PoV-News:> wrote:
>Here's a couple "crushed velvet" pictures that can be done in POV-Ray 3.0*,
>thanks to some people at AOL with plenty of helpful ideas.  Maybe not perfect
>but it's faked okay imo  :-)
>

Bob 

If you have the source for this could you post it somewhere pleas
I'm sure other people would be interested too.


-- 
Cheers
Steve              email mailto:sjl### [at] ndirectcouk

%HAV-A-NICEDAY Error not enough coffee  0 pps. 

web http://www.ndirect.co.uk/~sjlen/

or  http://start.at/zero-pps

 11:36pm  up  8:14,  3 users,  load average: 2.00, 2.09, 2.09


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From: Bob Hughes
Subject: Re: Not blinned (yet) [~45KB]
Date: 7 Feb 2000 03:19:23
Message: <389e800b@news.povray.org>
"Steve" <sjl### [at] ndirectcouk> wrote in message
news:slr### [at] zero-ppslocaldomain...
| If you have the source for this could you post it somewhere pleas
| I'm sure other people would be interested too.

Okay, I'll upload it to my links web space as well as putting it at the
povray.text.scene-files group under the name Crushed Velvet Texture.
The blinn highlighting was just a trial of it and not intended to be a
replacement of the old texture so I won't be uploading that, hope that's okay.
It really didn't make enough of a difference anyhow and also limited the use of
it to MegaPov if left that way.

Bob


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From: Peter Warren
Subject: Re: blinn25KB_BU
Date: 8 Feb 2000 08:59:33
Message: <38a02145@news.povray.org>
Steve wrote in message ...
>Most people I know can't program their VCR,
>so what do you call average?
I can't,or wouldn't bother programming my VCR,
average, here in Seattle, Cloudy.

>The image and example is very interesting.
I completely agree.
>Is BMRT still alive and kicking?
What, did Larry have a stroke or something?
Cor.

Peter Warren
war### [at] hotmailcom


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