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Can someone give me a list of all of the official ancestors and bastard
children of Pov 3.1g? (This info will be used as part of the "10 Best
CD" collection.
The list would be something like:
DBK Trace,
Pov 3.0001, 3.02, etc.
Super patch
Mega
Johnny's pathch #1123
etc.
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"Greg M. Johnson" wrote:
>
> Can someone give me a list of all of the official ancestors and bastard
> children of Pov 3.1g? (This info will be used as part of the "10 Best
> CD" collection.
>
No complete list, but:
The 3.1 subversions are described in:
http://www.povray.org/ftp/pub/povray/Official/revision.txt
I also found this coming with good old Pov 2.2:
What's New in POV-Ray 2.2
--------------------------
This bug-fix release adds no new features but fixes the following
bugs from version 2.1.
- Fixed problem with declared material_maps or declared objects with
material_maps (yet again)
- Eliminated unnecessary turbulence calculations in normals
- Fixed all known problems with height fields
- Fixed IBM.C problems for Watcom compiler DPMI support
- Added Symatec C compiler make files for IBM version
- New video modes added to Amiga version
What's New in POV-Ray 2.1
--------------------------
This bug-fix release adds no new features but fixes the following
bugs from version 2.0.
- Fixed problem in OBJECTS.C that caused problem on some Unix compilers
- Fixed problem with declared material_maps or declared objects with
material_maps
- Fixed IBM.C problems for Zortech compiler
- Created temporary fix for problems with normals, smooth triangles
beziers and height fields which created unsightly black spots
- Allows scale <-1,1,1> to work with boxes
- Cleared up inconsistency with -sr, -sc, -er, -ec numbering. Upper
left pixel is 1,1. Fixed -ec bug.
- Fixed three bezier patch bugs which caused lock-ups, missing reflection,
and triangle dropouts.
- Eliminated some restrictions on multiple clipped_by and bounded_by
- Fixed compiler problems on VMS/VAX
- Fixed scaling bug on degenerate triangles
- Fixed problem with water_level when using +MV1.0
- Fixed problem with color mapped TGA height fields
What's New in POV-Ray 2.0
-------------------------
The following is not intended to be an all-inclusive list of every
new feature, but should give experienced users a pretty good guide
of what has been changed and what has been added. Please refer to
POVRAY.DOC for details.
General:
-------
- Automatic bounding slabs for greatly enhanced rendering speed of
most scenes.
- Adding, subtracting, multiplying & dividing of floats & vectors.
- Clock global variable for external animation support.
- X, Y, and Z global vector constants.
- Improved antialiasing routine with new commandline options.
Commandline options:
-------------------
- Version switch for backwards compatibility.
- Starting/ending column/row switches for trace window.
- Relative/absolute values for trace window switches.
- Antialiasing jitter scale value and toggle.
- Number of antialiasing rays to shoot.
- Internal "clock" setting for animations.
Objects:
-------
- Soft penumbral shadows from extended area lights.
- Smoother Bezier patches.
- New simplified torus syntax.
- Heightfield water_level now uses range 0-1 instead of 0-255.
- Heightfields can now be clipped and used in CSG operations.
- Heightfields can be phong-shaded with the "smooth" option.
- New, improved finite cylinders, cones, and discs, with
optional "capping" of cones and cylinders.
- More versatile CSG unions have replaced the need for composites.
- CSG texturing has been made much more flexible.
- New "merge" removes internal boundaries between transparent
unioned objects.
Textures:
--------
- Hexagon pigment texture.
- Radial pigment texture.
- Mandelbrot pigment texture.
- Texture attributes grouped into 3 independently scalable groups:
pigment, normal, and finish.
- TIR (Total Internal Reflection) for more realistic refraction.
- Fractional Brownian Motion (fbm) turbulence controls.
- Turbulence can now be used independently with any pigment or normal
texture.
- Optional vector-style turbulence values.
- Background coloring.
- Color maps can now be declared.
- Frequency, phase keywords now available for use with color_maps.
- Filter keyword replaces "alpha", letting us reserve alpha for other
uses in the future.
- Less restrictive distribution policy. See POVLEGAL.DOC for
details.
--
Christoph Hormann <chr### [at] gmx de>
Homepage: http://www.schunter.etc.tu-bs.de/~chris/
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I think there was also a povray 1.0 or something like that.
--
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):_;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/
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Warp wrote:
>
> I think there was also a povray 1.0 or something like that.
>
Sorry, but i'm not that old ;-)
<nostalgic>
IIRC at that time i was using a 286 with monochrome graphics ... and was just
doing my first steps with the turbo pascal graphics mode ...
BTW, have you ever seen Windows 3.0 on a orange monochrome monitor :-)
</nostalgic>
Christoph
--
Christoph Hormann <chr### [at] gmx de>
Homepage: http://www.schunter.etc.tu-bs.de/~chris/
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Christoph Hormann wrote:
> No complete list, but:
>
> The 3.1 subversions are described in:
>
> http://www.povray.org/ftp/pub/povray/Official/revision.txt
I try to be subversive whenver possible. ;-)
-Mark Gordon
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Christoph Hormann wrote:
> <nostalgic>
> IIRC at that time i was using a 286 with monochrome graphics ... and was just
> doing my first steps with the turbo pascal graphics mode ...
>
> BTW, have you ever seen Windows 3.0 on a orange monochrome monitor :-)
> </nostalgic>
Does a "grey-scale" amber monitor count?
--
Francois Labreque | It is by caffeine alone I set my mind in motion, it
flabreq | is by the beans of Java that thoughts acquire speed,
@ | the hands acquire shaking, the shaking becomes a
attglobal.net | warning, it is by caffeine alone I set my mind in
| motion.
- Stolen from Badger's .sig file
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"Greg M. Johnson" <gre### [at] my-dejanews com> wrote in message
news:39AA5BE4.1314AA4D@my-dejanews.com...
| Can someone give me a list of all of the official ancestors and bastard
| children of Pov 3.1g?
Let's see now, I know these:
DKBTrace Ray-Tracer 1.2
DKBTrace Ray-Tracer 2.0
DKBTrace Ray-Tracer 2.05
DKBTrace Ray-Tracer 2.11
DKBTrace Ray-Tracer 2.12
(STAR, myth or legend? Not sure a distribution with that name ever occured)
POV-Ray Tracer 0.5
POV-Ray Tracer 1.0
POV-Ray Tracer 2.0
POV-Ray Tracer 2.1
POV-Ray Tracer 2.2
POV-Ray Tracer 3.0
POV-Ray Tracer 3.01
POV-Ray Tracer 3.02
POV-Ray Tracer 3.1
POV-Ray Tracer 3.1a
POV-Ray Tracer 3.1b
POV-Ray Tracer 3.1c
POV-Ray Tracer 3.1d
POV-Ray Tracer 3.1e
POV-Ray Tracer 3.1f
POV-Ray Tracer 3.1g
Super Patch (version #? Ron Parker's)
MegaPOV 0.1
MegaPOV 0.2
MegaPOV 0.3 (not positive of these, Nathan will know)
MegaPOV 0.4
MegaPOV 0.5
MegaPOV 0.5a
Bob
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Christoph Hormann wrote:
> BTW, have you ever seen Windows 3.0 on a orange monochrome monitor :-)
> </nostalgic>
I have never seen that colour reproduced on any non-monochrome monitor, and it's
a shame. That shade of gold has always been one of my all time favourites.
I think the problem is that those monitors produced gold purely, while modern
monitors try to cobble something together from rgb.
I set my xterms at work to gold on black, for nostalgia's sake.
Simon
PS: I ran Windows 2.0 on my gold monitor.
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On Tue, 29 Aug 2000 00:01:25 -0300, Simon de Vet wrote:
>
>
>Christoph Hormann wrote:
>
>> BTW, have you ever seen Windows 3.0 on a orange monochrome monitor :-)
>> </nostalgic>
>
>I have never seen that colour reproduced on any non-monochrome monitor, and it's
>a shame. That shade of gold has always been one of my all time favourites.
I still use one, for a debugging monitor. Shame you can't use one with an
AGP card, but Intel broke that.
--
Ron Parker http://www2.fwi.com/~parkerr/traces.html
My opinions. Mine. Not anyone else's.
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On Mon, 28 Aug 2000 08:32:36 -0400 "Greg M. Johnson"
<gre### [at] my-dejanews com> wrote:
>Can someone give me a list of all of the official ancestors and (unofficial)
>children of Pov 3.1g? (This info will be used as part of the "10 Best
>CD" collection.
Hi, Greg. Along with Bob's extensive list I add Dieter Bayer's FTPov
(Faster Than POV-Ray), which used his vista and light buffer speed-ups
now incorporated into the official version. It was based on POV-Ray v2.2
and distributed on CompuServe around 1993 or 1994.
--
Alan - ako### [at] povray org - a k o n g <at> p o v r a y <dot> o r g
http://www.povray.org - Home of the Persistence of Vision Ray Tracer
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Bob Hughes wrote:
> (STAR, myth or legend? Not sure a distribution with that name ever occured)
<<
Version 0.02 BETA Release 7/29/91 (as STAR-Light)
----------------------------------
First version is still basically DKBTrace 2.12 with a few new features.
- Materials mapping added by Drew Wells.(see matmap.dat)
- ONION & LEOPARD textures added by Scott Taylor.
- Time to trace display added by Bill Pulver.
- Grayscale display (+g) for IBM-PC's added by Scott Taylor.
- Small wood texture bug fixed to create true cylinders.
- Verbose now displays more info including file being traced.
- Option +vO added to enable old-style terse verbose.
- Texture.c broken into smaller modules.
- PAINTED1, 2, & 3 added for developers.
- BUMPY1, 2, & 3 added for developers.
>>
(excerpt from "history.doc", accompanying PV-Ray 0.5 beta package)
The "STAR-Light" name was dropped because of possible problems with
another software bearing that name.
And, until 1.0, it was "PV-Ray" (without an O)
Fabien.
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"Fabien Mosen" <fab### [at] skynet be> wrote in message
news:39AB83E2.99A84B5D@skynet.be...
| Bob Hughes wrote:
|
| > (STAR, myth or legend? Not sure a distribution with that name ever
occured)
|
| Version 0.02 BETA Release 7/29/91 (as STAR-Light)
----snipped----
| The "STAR-Light" name was dropped because of possible problems with
| another software bearing that name.
|
| And, until 1.0, it was "PV-Ray" (without an O)
Great to know. Thanks Fabien, I wondered about the possibility of a
different naming of the earlier POV-Ray versions but I checked up on it in
each of their Docs before posting. And I never say "Tracer" but say "Trace"
and am in eror to do so apparently. I don't have the version 0.5 so
couldn't check.
Bob
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Bob Hughes wrote:
>
> "Greg M. Johnson" <gre### [at] my-dejanews com> wrote in message
> news:39AA5BE4.1314AA4D@my-dejanews.com...
> | Can someone give me a list of all of the official ancestors and bastard
> | children of Pov 3.1g?
>
> Let's see now, I know these:
>
[Snip]
> POV-Ray Tracer 3.1g
> Super Patch (version #? Ron Parker's)
> MegaPOV 0.1
> MegaPOV 0.2
> MegaPOV 0.3 (not positive of these, Nathan will know)
> MegaPOV 0.4
> MegaPOV 0.5
> MegaPOV 0.5a
>
There should be UVPov, between SuperPatch and MegaPOV.
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On Mon, 28 Aug 2000 21:18:23 -0500, Bob Hughes wrote:
>"Greg M. Johnson" <gre### [at] my-dejanews com> wrote in message
>news:39AA5BE4.1314AA4D@my-dejanews.com...
>Super Patch (version #? Ron Parker's)
The released version(s) were 3.1a, 3.1e and 3.1g, based respectively on those
versions of POV-Ray. The 3.1a version might not have seen much distribution,
though. There was also a 3.0 version, but it was never released.
--
Ron Parker http://www2.fwi.com/~parkerr/traces.html
My opinions. Mine. Not anyone else's.
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Part of my vision for this benefit CD is to make it searchable by multiple
indices. One of them would be pov version. Also, I think the collection
would be neat if it were limited to the official releases and publicly
available patches. So the official list would be listed below. (Thanks to
Bob et al.) If someone used Chris Huff's particle patch or whatever, they
should tell us how to find the patch.
DKBTrace Ray-Tracer 1.2
DKBTrace Ray-Tracer 2.0
DKBTrace Ray-Tracer 2.05
DKBTrace Ray-Tracer 2.11
DKBTrace Ray-Tracer 2.12
POV-Ray Tracer 0.5
POV-Ray Tracer 1.0
POV-Ray Tracer 2.0
POV-Ray Tracer 2.1
POV-Ray Tracer 2.2
POV-Ray Tracer 3.01
POV-Ray Tracer 3.02
POV-Ray Tracer 3.1a
POV-Ray Tracer 3.1e
POV-Ray Tracer 3.1g
Super Patch
UVPov
MegaPOV 0.1
MegaPOV 0.2
MegaPOV 0.3 (not positive of these, Nathan will know)
MegaPOV 0.4
MegaPOV 0.5
MegaPOV 0.5a
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"Greg M. Johnson" wrote:
> DKBTrace Ray-Tracer 1.2
> DKBTrace Ray-Tracer 2.0
> DKBTrace Ray-Tracer 2.05
> DKBTrace Ray-Tracer 2.11
> DKBTrace Ray-Tracer 2.12
> POV-Ray Tracer 0.5
> POV-Ray Tracer 1.0
> POV-Ray Tracer 2.0
> POV-Ray Tracer 2.1
> POV-Ray Tracer 2.2
> POV-Ray Tracer 3.01
> POV-Ray Tracer 3.02
> POV-Ray Tracer 3.1a
> POV-Ray Tracer 3.1e
> POV-Ray Tracer 3.1g
> Super Patch
> UVPov
> MegaPOV 0.1
> MegaPOV 0.2
> MegaPOV 0.3 (not positive of these, Nathan will know)
> MegaPOV 0.4
> MegaPOV 0.5
> MegaPOV 0.5a
See also -
http://www.povray.org/links/3D_Programs/POV-Ray_Unofficial_Patches_and_Front_End_Programs/
for other patches of the program.
--
Ken Tyler - 1400+ POV-Ray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/
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"Vahur Krouverk" <vah### [at] aetec ee> wrote in message
news:39AB98A2.90181359@aetec.ee...
|
| There should be UVPov, between SuperPatch and MegaPOV.
Oops. That's what I get for not trying that one out when it was around.
Bob
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In article <39ABC12E.3259EE47@my-dejanews.com>,
gre### [at] my-dejanews com wrote:
> Part of my vision for this benefit CD is to make it searchable by
> multiple indices. One of them would be pov version. Also, I think the
> collection would be neat if it were limited to the official releases
> and publicly available patches. So the official list would be listed
> below. (Thanks to Bob et al.) If someone used Chris Huff's particle
> patch or whatever, they should tell us how to find the patch.
So people could search for a specific feature and find the POV versions
which support it?
> Super Patch
> UVPov
> MegaPOV 0.1
> MegaPOV 0.2
> MegaPOV 0.3 (not positive of these, Nathan will know)
> MegaPOV 0.4
> MegaPOV 0.5
> MegaPOV 0.5a
Don't forget the Smellenbergh's MultiPatch, which was the predescessor
to MacMegaPOV(and is where the unofficial interface comes from).
--
Christopher James Huff
Personal: chr### [at] mac com, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tag povray org, http://tag.povray.org/
<><
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Chris Huff wrote:
> So people could search for a specific feature and find the POV versions
> which support it?
That's not what I meant, and it's not something I was planning to do or
would find easy. If someone could arrange THAT database and there's value
to it (?), it could go in.
What I meant was that I would encourage each entry submission for the
collection to say what version of povray was used. A historian could look
to see just how primitive DBK images were; an "offical release" purist
could be inspired by the special effects of Mega to try it; the pov-team
might be impressed by a hand-coded patch to implement it, etc.....
Of course, I also envision a Columbian magazine editor or a kid wanting to
be inspired by just how good a landscape image can be to would be enabled
in their search by the categories of "country of origin" and "theme."
See :
http://www.geocities.com/pterandon/povcdform.html
> Don't forget the Smellenbergh's MultiPatch, which was the predescessor
> to MacMegaPOV(and is where the unofficial interface comes from).
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From: Warp
Subject: Vista and light buffers? (Was: List of povray versions)
Date: 29 Aug 2000 10:50:13
Message: <39abcda4@news.povray.org>
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Could someone explain me what exactly do vista and light buffers do? I'm
interested (I only have a vague idea about vista buffers but I'm not completely
sure).
--
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):_;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/
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On Tue, 29 Aug 2000 09:57:02 -0400, "Greg M. Johnson"
<gre### [at] my-dejanews com> wrote:
...
>POV-Ray Tracer 2.2
Stick FTPOV in here, it's where the auto-bounding, vista and light
buffers came from.
>POV-Ray Tracer 3.01
...
Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] usa net
TAG e-mail : pet### [at] tag povray org
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Peter Popov <pet### [at] usa net> wrote:
: Stick FTPOV in here, it's where the auto-bounding, vista and light
: buffers came from.
Ah, so the idea of implementing patched versions into the official povray
is not anything new :)
--
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):_;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/
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Warp wrote:
>
> Peter Popov <pet### [at] usa net> wrote:
> : Stick FTPOV in here, it's where the auto-bounding, vista and light
> : buffers came from.
>
> Ah, so the idea of implementing patched versions into the official povray
> is not anything new :)
Nor is the idea of patched versions of POV-Ray. When I first got a modem
and found the "Call me Ray BBS" I found several 2.2 patches that offered
speed enhancements over the official version plus the other better known
feature enhancement patches. POV-Ray v3.0 was also heavily dependent upon
user submitted patches.
--
Ken Tyler - 1400+ POV-Ray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/
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Warp wrote:
> Ah, so the idea of implementing patched versions into the official povray
> is not anything new :)
No, and though I can't recall a 1.0 patch, there were several (but
pretty quiet) 2.0 patches. I remember one that implemented some
basic Renderman shaders capabilities, and another one that did
halos, in a much different way that the one being implemented in 3.0.
At the time, there were also much more in-development free raytracers
(Rayshade, PolyRay, Vivid, Luxart,..), but POV-Ray ate it all,
by becoming increasingly friendly and powerful. POV-Ray is the
Microsoft of free raytracers ;-).
Now, it seems logical that programmers who wants to play with a
raytracer often choose to start from POV-Ray, instead of reinventing
the wheel.
Fabien.
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"Fabien Mosen" <fab### [at] skynet be> wrote in message
news:39AE1558.D0BB21DB@skynet.be...
| Warp wrote:
| > Ah, so the idea of implementing patched versions into the official
povray
| > is not anything new :)
|
| No, and though I can't recall a 1.0 patch, there were several (but
| pretty quiet) 2.0 patches.
This reminded me about the POV-PRO I used some. Using the DOS platform,
called version 3.02.proton, and made by Vadim .V Sytnikov, that thing could
render at surprisingly fast rates. A bare bones POV, image display was
ASCII text only (which looked interesting). IIRC I saw 25 to 50% render
times compared to the POV-Ray for Windows 3.02, depending on the type of
scene.
Btw, I thought I actually had version 3.0 at one time so sorry about
including that before.
Bob
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On Thu, 31 Aug 2000 10:20:40 +0200 Fabien Mosen <fab### [at] skynet be>
wrote:
>At the time, there were also much more in-development free raytracers
>(Rayshade, PolyRay, Vivid, Luxart,..)
<snip..>
Hi, Fabien. Xander originally intended for Polyray to be shareware but
it went the way of many other good-intentioned ideas :(
--
Alan - ako### [at] povray org - a k o n g <at> p o v r a y <dot> o r g
http://www.povray.org - Home of the Persistence of Vision Ray Tracer
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Peter Popov wrote:
>
> On Tue, 29 Aug 2000 09:57:02 -0400, "Greg M. Johnson"
> <gre### [at] my-dejanews com> wrote:
>
> ...
>
> >POV-Ray Tracer 2.2
>
> Stick FTPOV in here, it's where the auto-bounding, vista and light
> buffers came from.
>
Also put in ATM-POV (?) which had various lighting and media (?)
effects, and ISO-POV which is where the isosurfaces came into the
patches.
> >POV-Ray Tracer 3.01
>
> ...
>
> Peter Popov ICQ : 15002700
> Personal e-mail : pet### [at] usa net
> TAG e-mail : pet### [at] tag povray org
Mike Andrews.
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In article <39AFDDB6.29C81169@reading.ac.uk>, Michael Andrews
<M.C### [at] reading ac uk> wrote:
> Also put in ATM-POV (?) which had various lighting and media (?)
> effects,
I think you mean POV-AFX:
http://www.geocities.com/TimesSquare/2143/povafx10.html
I have been thinking of going through it to see if any of the features
of this version would still be useful in more recent versions, and how
they would be added.
--
Christopher James Huff
Personal: chr### [at] mac com, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tag povray org, http://tag.povray.org/
<><
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On Fri, 01 Sep 2000 12:01:06 -0500, Chris Huff wrote:
>In article <39AFDDB6.29C81169@reading.ac.uk>, Michael Andrews
><M.C### [at] reading ac uk> wrote:
>
>> Also put in ATM-POV (?) which had various lighting and media (?)
>> effects,
>
>I think you mean POV-AFX:
>http://www.geocities.com/TimesSquare/2143/povafx10.html
>
>I have been thinking of going through it to see if any of the features
>of this version would still be useful in more recent versions, and how
>they would be added.
I think "glow" would be useful.
><><
<><
'`
--
Ron Parker http://www2.fwi.com/~parkerr/traces.html
My opinions. Mine. Not anyone else's.
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In article <slr### [at] fwi com>, ron### [at] povray org
wrote:
> I think "glow" would be useful.
That's the main one I was looking at...I have downloaded the source and
am about to check it out further. Also, there is something mentioned on
the web page that looks *very* interesting:
"Hey, we (small computer graphics research group here at Málaga univ,
Spain, under the auspices of Prof. Villatoro) have devised a new and
pretty nice effect: an analytic scattering model using Warn-style light
sources (see [4]). In other words, smoooooooth "spotlights" within the
fog, not those usual hard conical light beams... and WITHOUT any kind
of volume sampling (so this is still fast and robust). I will probably
release a new version of POVAFX with these lights soon (somewhere in
March-April 1996), and will put some examples here as well."
I didn't see any more about this, so if they ever got around to writing
this patch, they didn't put it on that web site. But it does sound
interesting...
--
Christopher James Huff
Personal: chr### [at] mac com, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tag povray org, http://tag.povray.org/
<><
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Alan Kong wrote:
>
> On Thu, 31 Aug 2000 10:20:40 +0200 Fabien Mosen <fab### [at] skynet be>
> wrote:
>
> >At the time, there were also much more in-development free raytracers
> >(Rayshade, PolyRay, Vivid, Luxart,..)
> <snip..>
>
> Hi, Fabien. Xander originally intended for Polyray to be shareware but
> it went the way of many other good-intentioned ideas :(
In fact, "Luxart" was shareware too, I should have written "free or
inexpensive" ! At least, PolyRay has survived in the form of a plugin
for Moray !
Fabien.
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On Fri, 01 Sep 2000 19:45:05 +0200 Fabien Mosen <fab### [at] skynet be>
wrote:
>In fact, "Luxart" was shareware too, I should have written "free or
>inexpensive" ! At least, PolyRay has survived in the form of a plugin
>for Moray !
Agreed. When I heard Xander talking about it I rushed to download the
plug-in and play around with it. Great fun!
--
Alan - ako### [at] povray org - a k o n g <at> p o v r a y <dot> o r g
http://www.povray.org - Home of the Persistence of Vision Ray Tracer
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