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From: TonyB
Subject: Re: POV-RayUnofficial 3.1g MultiPatch for Macintosh PPC/68k uploaded
Date: 15 Nov 1999 21:16:48
Message: <3830be90@news.povray.org>
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>No immediate danger of me stopping my patch work. It will slow down a
>bit, though. If anyone has any suggestions or ideas for new features, I
>would like to hear them. :-)
Wish list, for now: anisotropics, blinn shading, and subsurface scattering.
I'll think of more things as they come...
Thanks for all you have done so far. Believe me, I do appreciate it and I'm
very greatful. Please keep it up. =)
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Could you explain what anisotropics, blinn shading, and subsurface
scattering are? I have no idea what they do, I never even heard of
them.(except anisotropics, I have heard of those. I don't know what they
do, though.) :-)
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On Tue, 16 Nov 1999 07:14:38 -0500, Chris Huff wrote:
>Could you explain what anisotropics, blinn shading, and subsurface
>scattering are? I have no idea what they do, I never even heard of
>them.(except anisotropics, I have heard of those. I don't know what they
>do, though.) :-)
An anisotropic shader would have different effects depending on not just
the local "elevation" of the incident ray, as is usual, but also the local
"azimuth." Think of one of those Christmas ornaments that's wrapped with
fine fiber and thus has a ring-shaped highlight. I'm thinking such a thing
would require UV mapping as a prerequisite.
--
These are my opinions. I do NOT speak for the POV-Team.
The superpatch: http://www2.fwi.com/~parkerr/superpatch/
My other stuff: http://www2.fwi.com/~parkerr/traces.html
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From: TonyB
Subject: Re: POV-RayUnofficial 3.1g MultiPatch for Macintosh PPC/68k uploaded
Date: 16 Nov 1999 14:07:37
Message: <3831ab79@news.povray.org>
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Blinn is a type of shading like phong that is good for simulating cloth
materials (I saw it in Max). Subsurface scattering is a rendering concept
that considers all objects partially transparent and renders the light and
its interactions just a little below the surface. If also seems to help in
wetting or dampening surfaces.
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These sound interesting, know of any web sites with more info?
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From: TonyB
Subject: Re: POV-RayUnofficial 3.1g MultiPatch for Macintosh PPC/68k uploaded
Date: 16 Nov 1999 21:28:11
Message: <383212bb@news.povray.org>
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About blinn shading, no, not really. Perhaps somewhere on Kinetix's site, or
you can look around. About the subsurf scat, someone recently posted a link
to the original inspiration to Nathan Kopp's photon mapping and it's in
there.
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There seems to be a problem with filtering objects, filter is treated
like transmit. I haven't downloaded the bug-fixed version yet, but this
seems to be unrelated to that bug.
For example, this:
sphere {< 0, 0, 0>, 1
pigment {color Green filter 1}
translate < 0, 1.0001, 0>
}
is invisible when placed on a ground plane, when it should show up as a
green transparent sphere.
This happens with #version 3.1 but not with #version 3.14159, I don't
know if it happens in UVPov.
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From: Ken
Subject: Re: POV-RayUnofficial 3.1g MultiPatch for Macintosh PPC/68k uploaded
Date: 18 Nov 1999 05:34:57
Message: <3833D612.B2DF0E2C@pacbell.net>
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Chris Huff wrote:
>
> There seems to be a problem with filtering objects, filter is treated
> like transmit. I haven't downloaded the bug-fixed version yet, but this
> seems to be unrelated to that bug.
> For example, this:
> sphere {< 0, 0, 0>, 1
> pigment {color Green filter 1}
> translate < 0, 1.0001, 0>
> }
> is invisible when placed on a ground plane, when it should show up as a
> green transparent sphere.
> This happens with #version 3.1 but not with #version 3.14159, I don't
> know if it happens in UVPov.
I recall that Warp mentioned something about a dissapearing filtered sphere
problem with UVPov v6.0 that Nathan was going to fix for UVPov v6.1. That
may explain the difference.
--
Ken Tyler - 1200+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/
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Oh, and the sphere_sweep template form produces b-spline_sphere_sweep
instead of b_spline_sphere_sweep, I thought this was fixed before?
Still using the Nov 15 version, I lost the connection in the middle of
downloading the new version. :-(
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Chris Huff <Chr### [at] compuserve com> wrote:
> Oh, and the sphere_sweep template form produces b-spline_sphere_sweep
> instead of b_spline_sphere_sweep, I thought this was fixed before?
We almost had a hardattack while reading this mail! :-)
Keeping cool was the way to go... yes, it was fixed and still is but
there were two spots in the source producing this text. We cleaned up
the sources and guess what: we kept the code producing the wrong test.
It is harmless, and we will fix it for a next version.
Thanks for taking a few year of of our lives. :-) :-)
> Still using the Nov 15 version, I lost the connection in the middle of
> downloading the new version. :-(
We know that feeling, we had the same problem if we wanted to download
from the US. We must admid that this didn't happen for a long time now.
We do know that we have a good server, located here in Belgium, and
perhaps you have to solve it like we did: download after rush hours.
Smellenbergh
--
e-mail:sme### [at] skynetbe
http://users.skynet.be/smellenbergh
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