POV-Ray : Newsgroups : povray.binaries.images : Is POVRay wrong or am I? Server Time
5 Nov 2024 02:22:23 EST (-0500)
  Is POVRay wrong or am I? (Message 1 to 8 of 8)  
From: Simon
Subject: Is POVRay wrong or am I?
Date: 9 Feb 2008 11:05:08
Message: <47adcf34@news.povray.org>
I'm guessing it's going to be me that's wrong BUT...

Does the texturing on the attached image look correct? it seems that as 
soon as the light is going through my water (an ior'd isosurface), the 
texture (but not pigment) is removed from the bricks.

If this is accurate, would someone be kind enough to let me know?

Thanks

Simon


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bricks074.jpg


 

From: Christian Froeschlin
Subject: Re: Is POVRay wrong or am I?
Date: 9 Feb 2008 11:12:39
Message: <47add0f7$1@news.povray.org>
Simon wrote:

> Does the texturing on the attached image look correct? it seems that as 
> soon as the light is going through my water (an ior'd isosurface), the 
> texture (but not pigment) is removed from the bricks.

Possibly your surface shadows the bricks so you only get ambient
light, in which case you don't see normals or shading.


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From: Simon
Subject: Re: Is POVRay wrong or am I?
Date: 9 Feb 2008 21:37:36
Message: <47ae6370$1@news.povray.org>
Christian Froeschlin wrote:
> Simon wrote:
> 
>> Does the texturing on the attached image look correct? it seems that 
>> as soon as the light is going through my water (an ior'd isosurface), 
>> the texture (but not pigment) is removed from the bricks.
> 
> Possibly your surface shadows the bricks so you only get ambient
> light, in which case you don't see normals or shading.

Thanks. I imagine that's exactly what it is. Do you know how I can stop 
the surface doing that? I suppose I could use no_shadow?

Failing that, I was planning on adding photons - would they show the 
shading/normals ?

Thanks

Simon


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From: Nicolas Alvarez
Subject: Re: Is POVRay wrong or am I?
Date: 9 Feb 2008 21:50:56
Message: <47ae6690$1@news.povray.org>
Or you could use "real bricks" instead of a normal perturbation :)


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From: Simon
Subject: Re: Is POVRay wrong or am I?
Date: 10 Feb 2008 06:48:16
Message: <47aee480$1@news.povray.org>
Nicolas Alvarez wrote:
> Or you could use "real bricks" instead of a normal perturbation :)

Sounds like what I need - so whilst bump mapping won't show, if I 
actually perturb the surface, it should look fine. does that sound correct?

Seriously, the more pointers anyone can give me, the better.

Thanks :)

Simon


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From: Blue Herring
Subject: Re: Is POVRay wrong or am I?
Date: 10 Feb 2008 10:05:02
Message: <web.47af12826d8a5ecab05f96f70@news.povray.org>
Simon <povray@*NOSPAM*SOWare.co.uk> wrote:
> Nicolas Alvarez wrote:
> > Or you could use "real bricks" instead of a normal perturbation :)
>
> Sounds like what I need - so whilst bump mapping won't show, if I
> actually perturb the surface, it should look fine. does that sound correct?
>
> Seriously, the more pointers anyone can give me, the better.

Radiosity with normals turned on instead of standard ambient light might work as
well, though it may be slower than other methods.

-The Mildly Infamous Blue Herring


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From: Nekar
Subject: Re: Is POVRay wrong or am I?
Date: 10 Feb 2008 10:25:52
Message: <47af1780@news.povray.org>
Have you tried double_illumination in your water?

-Nekar


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From: Bill Pragnell
Subject: Re: Is POVRay wrong or am I?
Date: 11 Feb 2008 09:30:01
Message: <web.47b05ad46d8a5eca731f01d10@news.povray.org>
Simon <povray@*NOSPAM*SOWare.co.uk> wrote:
> Nicolas Alvarez wrote:
> > Or you could use "real bricks" instead of a normal perturbation :)
>
> Sounds like what I need - so whilst bump mapping won't show, if I
> actually perturb the surface, it should look fine. does that sound correct?

You could use isosurfaces (slow), or my mesh brick macro:
http://www.infradead.org/~wmp/macro_bricks.html

You won't need very high-res meshes to do what you want so it should parse
really quickly. :)


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