POV-Ray : Newsgroups : povray.binaries.images : [BUG?] woods.inc - T_Wood12 Server Time
12 Aug 2024 05:21:57 EDT (-0400)
  [BUG?] woods.inc - T_Wood12 (Message 1 to 3 of 3)  
From: Bonsai
Subject: [BUG?] woods.inc - T_Wood12
Date: 25 Sep 2003 05:54:23
Message: <3f72bb4f@news.povray.org>
Hi,

I think I found a little bug in the wood.inc include file. When I render 
the texture T_Wood12 I get strange patterns. Have a look at the 
attachment please. The problem is caused by the two textures that are 
overlayed in the definition of T_Wood12 in woods.inc. Rotating one 
texture by 90 degrees on the y-axis solves this. So I searched deeper in 
wood.inc and found the definition of the wood grain:

#declare P_WoodGrain12A =
pigment {
     bozo
     turbulence 0.04
     lambda 2.5
     omega 0.1
     octaves 7
     scale <0.5, 0.05, 0.05>
}

The scaling of 0.5 for the x-value should be 0.05 and the scaling for 
the z-value should be 0.5. Then everything looks o.k. without rotating 
one texture.

I hope this makes any sence. :-)

So long,

Bonsai

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Attachments:
Download 't_wood12_error.jpg' (10 KB)

Preview of image 't_wood12_error.jpg'
t_wood12_error.jpg


 

From: Bonsai
Subject: Re: [BUG?] woods.inc - T_Wood12
Date: 25 Sep 2003 06:03:39
Message: <3f72bd7b$1@news.povray.org>
Scene description showing the bug is in p.t.scene-files:

news://news.povray.org:119/3f72bd28@news.povray.org

So long,

Bonsai

-- 
<--------------------------->
    ___ __ __  _ ___ ___  _
   | _ )  \  \( )  _) _ )( )
   | _ \() |\ \ |\ \/ _ \| |
   |___/__/_)\__)___)/ \_)_)

        www.b0n541.net
<--------------------------->

"Hi. I'm a signature virus. Add me to your signature - help me spread!"


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From: Christopher James Huff
Subject: Re: [BUG?] woods.inc - T_Wood12
Date: 12 Oct 2003 20:05:54
Message: <cjameshuff-49A0C6.20033512102003@netplex.aussie.org>
In article <3f72bb4f@news.povray.org>, Bonsai <bon### [at] b0n541net> 
wrote:

> I think I found a little bug in the wood.inc include file. When I render 
> the texture T_Wood12 I get strange patterns.

These "strange patterns" are called figuring. Straight flat grain is 
boring. The real thing has depth that you can't see in a photo (and 
which POV can't currently simulate), but here are some examples:
http://www.davidreedsmith.com/Shuttles/PommeleSapeleWood.jpg
http://www.davidreedsmith.com/Shuttles/CurlyMapleWood.jpg
http://www.curlymaple.com/softmpl.shtml

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/


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