POV-Ray : Newsgroups : povray.newusers : Unrealistic looking normal maps Server Time
5 Sep 2024 16:19:11 EDT (-0400)
  Unrealistic looking normal maps (Message 1 to 4 of 4)  
From: kiriakos
Subject: Unrealistic looking normal maps
Date: 29 Feb 2000 00:07:28
Message: <38BB5439.DCF0E5F7@magnet.gr>
Hello everyone,

I'm a really new user of POV-Ray. I  have installed it a couple years or
so ago, and updated recently to 3.1g, but never had enough time to learn
it as much I would like. But I have read the documentation and I have a
pretty good idea of the basic aspects.

What I would like to ask is if there is a way to overcome the
not-so-realistic look of bumps on the edges of solid objects not
showing, because of the bumps being a normal map and not real bumps
anyway. To put it simpler, is there some way to make bumps really show
on the edges of an object? Or is this hopeless?

GG


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From: Steve
Subject: Re: Unrealistic looking normal maps
Date: 29 Feb 2000 00:23:29
Message: <slrn8bmloa.54i.sjlen@zero-pps.localdomain>
On Tue, 29 Feb 2000 07:08:09 +0200, kiriakos <kir### [at] magnetgr> wrote:
>Hello everyone,
>
>I'm a really new user of POV-Ray. I  have installed it a couple years or
>so ago, and updated recently to 3.1g, but never had enough time to learn
>it as much I would like. But I have read the documentation and I have a
>pretty good idea of the basic aspects.
>
>What I would like to ask is if there is a way to overcome the
>not-so-realistic look of bumps on the edges of solid objects not
>showing, because of the bumps being a normal map and not real bumps
>anyway. To put it simpler, is there some way to make bumps really show
>on the edges of an object? Or is this hopeless?

Hi and welcome aboard.

The answer to your question is probably an isosurface, a feature now 
available in a patched version of pov called MegaPOV, you can get 
MegaPOV from http://nathan.kopp.com/ .  But no doubt there'll be 
someone along soon who can give you a better description of MegaPOV
and the isosurface.   Have a look at Nathan's web pages.

Good luck. 

-- 
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

  5:13am  up 3 days,  1:04,  4 users,  load average: 1.08, 1.23, 1.40


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From: Nieminen Juha
Subject: Re: Unrealistic looking normal maps
Date: 29 Feb 2000 07:33:07
Message: <38bbbc82@news.povray.org>
kiriakos <kir### [at] magnetgr> wrote:
: Or is this hopeless?

  It is more or less hopeless.

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/


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From: Bob Hughes
Subject: Re: Unrealistic looking normal maps
Date: 29 Feb 2000 21:50:22
Message: <38bc856e@news.povray.org>
"Steve" <sjl### [at] ndirectcouk> wrote in message
news:slr### [at] zero-ppslocaldomain...
| On Tue, 29 Feb 2000 07:08:09 +0200, kiriakos <kir### [at] magnetgr> wrote:
| >
| >What I would like to ask is if there is a way to overcome the
| >not-so-realistic look of bumps on the edges of solid objects not
| >showing, because of the bumps being a normal map and not real bumps
| >anyway. To put it simpler, is there some way to make bumps really show
| >on the edges of an object? Or is this hopeless?
|
| The answer to your question is probably an isosurface, a feature now
| available in a patched version of pov called MegaPOV, you can get
| MegaPOV from http://nathan.kopp.com/ .  But no doubt there'll be
| someone along soon who can give you a better description of MegaPOV
| and the isosurface.   Have a look at Nathan's web pages.

Think that about says it.  But you might want a look at Samuel's isosurface
tutorial (under construction) too for something to go on:
http://members.aol.com/stbenge/iso/iso_tutorial.html

Bob


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