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here is the version 1.5 (I've just added a '+' sign in order to make the
surface react to multiple lights !!)
I hope it isn't too dark this time !
I added a light source, made more spheres and added a little bump.
I tried to replace the spheres by a bumps pattern but, even if the shape
of the pattern is close to the original, the render is very ugly so, I
came back to my spheres...slow but nice !
David
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Attachments:
Download 'insect - test01.jpg' (61 KB)
Preview of image 'insect - test01.jpg'
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gemelli david wrote:
>
> here is the version 1.5 (I've just added a '+' sign in order to make the
> surface react to multiple lights !!)
>
> I hope it isn't too dark this time !
> I added a light source, made more spheres and added a little bump.
> I tried to replace the spheres by a bumps pattern but, even if the shape
> of the pattern is close to the original, the render is very ugly so, I
> came back to my spheres...slow but nice !
>
Might want to try something like in:
Message-ID: <39A31644.AB3DE5EF@online.no>
Date: Wed, 23 Aug 2000 02:09:40 +0200
From: Tor Olav Kristensen <tto### [at] online no>
Subject: 72 Antiblobs (120kB + 22kB)
BTW, do you want to publish the shader code? :-)
Christoph
--
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
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I've posted the shader and the test scene in povray.text.scene-files.
David
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> Might want to try something like in:
>
> Message-ID: <39A31644.AB3DE5EF@online.no>
> Date: Wed, 23 Aug 2000 02:09:40 +0200
> From: Tor Olav Kristensen <tto### [at] onlineno>
> Subject: 72 Antiblobs (120kB + 22kB)
Don't know if you wanted ME to do it but, here it is !
(thanks Tor for the scene... and Christoph for the idea...)
David
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Attachments:
Download 'antiblobs.jpg' (82 KB)
Preview of image 'antiblobs.jpg'
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That looks good, i wonder if some reflection would be good, of course that
would require some environment to reflect.
I had a look at the shader code and although i do not yet completely
understand how it works, the same should be possible with the slope
pattern, although you then have to take the light positions into account.
Christoph
--
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
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> That looks good, i wonder if some reflection would be good, of course that
> would require some environment to reflect.
>
I'll make tests at home...
>
> I had a look at the shader code and although i do not yet completely
> understand how it works, the same should be possible with the slope
> pattern, although you then have to take the light positions into account.
>
I don't comment my tests in general...I know, it's not a good thing...
The advantage of the shader is that the lights positions are given (not
exactly but, the result is the same, you know where it comes from) and ease a
lot the work...this shader is simple (I think) because, there is no real
physic behind !
I just do a gradient with the 2 colors. the coef is given by the angle between
the light and the surface normal (Ln.Nn).
David
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>
> I'll make tests at home...
>
I made tests at home !!
David
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Attachments:
Download 'antiblobs rad.jpg' (31 KB)
Preview of image 'antiblobs rad.jpg'
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It looks good, some aspects of iridescence are still missing, but it's
probably difficult to simulate with povray anyway.
I found that combining radiosity with shaders somehow leads to strange
results, in this case radiosity should not have much influence on the
object, but i did not manage to achieve that.
Christoph
--
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
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gemelli david wrote:
>
> > Might want to try something like in:
> >
> > Message-ID: <39A31644.AB3DE5EF@online.no>
> > Date: Wed, 23 Aug 2000 02:09:40 +0200
> > From: Tor Olav Kristensen <tto### [at] onlineno>
> > Subject: 72 Antiblobs (120kB + 22kB)
>
> Don't know if you wanted ME to do it but, here it is !
> (thanks Tor for the scene... and Christoph for the idea...)
I'm happy to see this !
But can you please explain to me what a "shader" is ?
And what is POVMan ?
--
Best regards,
Tor Olav
mailto:tor### [at] hotmailcom
http://www.crosswinds.net/~tok/tokrays.html
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Tor Olav Kristensen wrote:
> But can you please explain to me what a "shader" is ?
>
> And what is POVMan ?
POVMan is a POV/Renderman hybrod or such IIRC.
I'm going to venture a guess on shaders, but I don't actually know: does
it let you specify a falloff_map of sorts, like a color_map or slope_map
except related to brilliance and angle of incidence? I'm guessing
because I notice hue changes perpendicular to the light direction in
these renders.
--
David Fontaine <dav### [at] faricynet> ICQ 55354965
My raytracing gallery: http://davidf.faricy.net/
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