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From: Bob Hughes
Subject: Sascha/Escher Waterfall Illusion [~175kb Jpg]
Date: 14 Mar 2000 07:40:10
Message: <38ce332a@news.povray.org>
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I came across this scene file recently among the files I have which was done for
the IRTC by Sascha Ledinsky for the Water stills round back in '98. I didn't
realize it had come from there at first since I could only look for "Sascha
Ledinsky" by internet search (easier to find than you might think).
I had apparently tried in vain to fix it a year ago so that the render didn't
need to be split into two sections in order for the illusion to work. I had
more success at it this second time now having used boxes to clip the pertinent
parts instead of the planes as was originally done (not as easy as it sounds).
And of course it's still not perfect.
Anyway, it's one of those very interesting 3D models and effects that is
intriguing to many people so I thought I'd show it here. Sascha's is at:
http://oz.irtc.org/ftp/pub/stills/1998-10-31/waterfa1.jpg
Replace the "jpg" with "txt" or "zip" to get to those files there. Anyone
wanting to see my changed version could ask here (don't email) but I have yet to
hear from Sascha regarding passing around this copyrighted scene file modified
or not.
Bob
--
omniVerse http://users.aol.com/persistenceofv/all.htm
Post a reply to this message
Attachments:
Download 'escherwaterfallcopy.jpg' (129 KB)
Preview of image 'escherwaterfallcopy.jpg'
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From: Bob Hughes
Subject: Re: Sascha/Escher Waterfall Illusion [~175kb Jpg]
Date: 14 Mar 2000 08:37:33
Message: <38ce409d@news.povray.org>
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I just got a reply to my first email to Sascha. Web page address is:
http://members.teleweb.at/sascha.l
which leads to some more Escher Pov 3.* images.
Bob
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From: Rick [Kitty5]
Subject: Re: Sascha/Escher Waterfall Illusion [~175kb Jpg]
Date: 14 Mar 2000 10:13:43
Message: <38ce5727$1@news.povray.org>
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how about posting a different view point, so we can see all your hard
construction work! - (not that we want to know how it was done or anything!)
Rick
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From: Bob Hughes
Subject: Re: Sascha/Escher Waterfall Un-Illusion [~24kb Jpg]
Date: 14 Mar 2000 12:15:03
Message: <38ce7397@news.povray.org>
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"Rick [Kitty5]" <pov### [at] dial pipexcom> wrote in message
news:38ce5727$1@news.povray.org...
| how about posting a different view point, so we can see all your hard
| construction work! - (not that we want to know how it was done or anything!)
Okay. Interesting, isn't it? Hope this small rendering shows it okay.
My hard work would only be that this illusion can be rendered in one go, rather
than the two it took before which was what Sascha Ledinsky had to do in order to
get the illusion to work. I've also now heard that this unfinished work was
never completed, sadly enough. If you read the waterfa1.txt at the URL I put
into my other message here an explanation is given as to how it was previously
done.
There isn't really much visible sign of the difference between the before and
after modification renders except for aesthetic change (and less than perfect
fix).
Sascha had done the tough part already.
Bob
Post a reply to this message
Attachments:
Download 'unescherwaterfallcopy.jpg' (18 KB)
Preview of image 'unescherwaterfallcopy.jpg'
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From: Mike Weber
Subject: Re: Sascha/Escher Waterfall Un-Illusion [~24kb Jpg]
Date: 14 Mar 2000 13:09:01
Message: <38ce803d@news.povray.org>
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cheater.... :)
--
Mike
wk: mik### [at] pyxiscom www.pyxis.com
hm: mwe### [at] sciticom www.geocities.com/mikepweber
www.geocities.com/mikepweber
"Bob Hughes" <omn### [at] hotmailcom?subject=PoV-News:> wrote in message
news:38ce7397@news.povray.org...
> "Rick [Kitty5]" <pov### [at] dialpipexcom> wrote in message
> news:38ce5727$1@news.povray.org...
> | how about posting a different view point, so we can see all your hard
> | construction work! - (not that we want to know how it was done or
anything!)
>
> Okay. Interesting, isn't it? Hope this small rendering shows it okay.
> My hard work would only be that this illusion can be rendered in one go,
rather
> than the two it took before which was what Sascha Ledinsky had to do in
order to
> get the illusion to work. I've also now heard that this unfinished work
was
> never completed, sadly enough. If you read the waterfa1.txt at the URL
I put
> into my other message here an explanation is given as to how it was
previously
> done.
> There isn't really much visible sign of the difference between the before
and
> after modification renders except for aesthetic change (and less than
perfect
> fix).
> Sascha had done the tough part already.
>
> Bob
>
>
>
>
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From: Bob Hughes
Subject: Re: Sascha/Escher Waterfall Un-Illusion [~24kb Jpg]
Date: 14 Mar 2000 13:47:28
Message: <38ce8940$1@news.povray.org>
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"Mike Weber" <mik### [at] pyxiscom> wrote in message
news:38ce803d@news.povray.org...
| cheater.... :)
<guilty conscience>
Hey, lulls in ones own efforts to be creative requires desperate measures to be
taken. I cannot be responsible for my actions during such times.
</guilty conscience>
Bob
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A true magician must not reveal his secrets...
Well done though...
Bob Hughes wrote:
> "Rick [Kitty5]" <pov### [at] dialpipexcom> wrote in message
> news:38ce5727$1@news.povray.org...
> | how about posting a different view point, so we can see all your hard
> | construction work! - (not that we want to know how it was done or anything!)
>
> Okay. Interesting, isn't it? Hope this small rendering shows it okay.
> My hard work would only be that this illusion can be rendered in one go, rather
> than the two it took before which was what Sascha Ledinsky had to do in order to
> get the illusion to work. I've also now heard that this unfinished work was
> never completed, sadly enough. If you read the waterfa1.txt at the URL I put
> into my other message here an explanation is given as to how it was previously
> done.
> There isn't really much visible sign of the difference between the before and
> after modification renders except for aesthetic change (and less than perfect
> fix).
> Sascha had done the tough part already.
>
> Bob
>
> [Image]
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On Tue, 14 Mar 2000 11:14:05 -0600, "Bob Hughes"
<omn### [at] hotmailcom?subject=PoV-News:> wrote:
>"Rick [Kitty5]" <pov### [at] dialpipexcom> wrote in message
>news:38ce5727$1@news.povray.org...
>| how about posting a different view point, so we can see all your hard
>| construction work! - (not that we want to know how it was done or anything!)
>
>Okay. Interesting, isn't it? Hope this small rendering shows it okay.
>My hard work would only be that this illusion can be rendered in one go, rather
>than the two it took before which was what Sascha Ledinsky had to do in order to
>get the illusion to work. I've also now heard that this unfinished work was
>never completed, sadly enough. If you read the waterfa1.txt at the URL I put
>into my other message here an explanation is given as to how it was previously
>done.
>There isn't really much visible sign of the difference between the before and
>after modification renders except for aesthetic change (and less than perfect
>fix).
>Sascha had done the tough part already.
>
>Bob
>
Nice work Bob
----------------------------
dav### [at] cableinetcouk
http://members.vavo.com/squiffy/
http://www.hamiltonite.mcmail.com
----------------------------
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From: Bob Hughes
Subject: Re: Sascha/Escher Waterfall Un-Illusion [~24kb Jpg]
Date: 14 Mar 2000 23:07:00
Message: <38cf0c64@news.povray.org>
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Thanks, but maybe more trouble than it's worth. I've had to try and explain
here at home to people that I didn't make it to begin with. Maybe that's a good
sign.
Bob
"David Wilkinson" <dav### [at] cableinetcouk> wrote in message
news:ppltcs0sroq96nv4jlqoveq5ces2vnafvd@4ax.com...
| On Tue, 14 Mar 2000 11:14:05 -0600, "Bob Hughes"
| <omn### [at] hotmailcom?subject=PoV-News:> wrote:
|
| >"Rick [Kitty5]" <pov### [at] dialpipexcom> wrote in message
| >news:38ce5727$1@news.povray.org...
| >| how about posting a different view point, so we can see all your hard
| >| construction work! - (not that we want to know how it was done or
anything!)
| >
| >Okay. Interesting, isn't it? Hope this small rendering shows it okay.
| >My hard work would only be that this illusion can be rendered in one go,
rather
| >than the two it took before which was what Sascha Ledinsky had to do in order
to
| >get the illusion to work. I've also now heard that this unfinished work was
| >never completed, sadly enough. If you read the waterfa1.txt at the URL I
put
| >into my other message here an explanation is given as to how it was
previously
| >done.
| >There isn't really much visible sign of the difference between the before and
| >after modification renders except for aesthetic change (and less than perfect
| >fix).
| >Sascha had done the tough part already.
| >
| >Bob
| >
| Nice work Bob
| ----------------------------
| dav### [at] cableinetcouk
| http://members.vavo.com/squiffy/
| http://www.hamiltonite.mcmail.com
| ----------------------------
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On Tue, 14 Mar 2000 11:14:05 -0600 "Bob Hughes"
<omn### [at] hotmailcom?subject=PoV-News:> wrote:
>Okay. Interesting, isn't it? Hope this small rendering shows it okay.
>My hard work would only be that this illusion can be rendered in one go, rather
>than the two it took before which was what Sascha Ledinsky had to do in order to
>get the illusion to work.
I wonder how Sascha's scene would look as a cross-eyed stereogram?
--
Alan - ako### [at] povrayorg - 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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From: Bob Hughes
Subject: Re: Sascha/Escher Waterfall Un-Illusion [~24kb Jpg]
Date: 15 Mar 2000 03:22:17
Message: <38cf4839@news.povray.org>
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"Alan Kong" <ako### [at] povrayNO-SPAMorg> wrote in message
news:q1aucs0qhjda8o3vvqfhrqftcmcdir030f@4ax.com...
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| I wonder how Sascha's scene would look as a cross-eyed stereogram?
Really neat of course. Problem is how to go about it, since it uses the
'orthographic' camera. I was about to try that anyway eventually just to see if
it could be done by shifting the clipping objects a little and using a very
zoomed in perspective camera.
Will let you know if it can be.
Bob
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From: Rick [Kitty5]
Subject: Re: Sascha/Escher Waterfall Un-Illusion [~24kb Jpg]
Date: 15 Mar 2000 06:52:26
Message: <38cf797a@news.povray.org>
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> >Okay. Interesting, isn't it? Hope this small rendering shows it okay.
> >My hard work would only be that this illusion can be rendered in one go,
rather
> >than the two it took before which was what Sascha Ledinsky had to do in
order to
> >get the illusion to work.
>
> I wonder how Sascha's scene would look as a cross-eyed stereogram?
I dont know if it would work correctly , worth a try tho (might give you
more headaches than it worth tho!)
Very good un-illusion :)
Rick
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From: Bob Hughes
Subject: Re: Sascha/Escher Waterfall Un-Illusion [~102kb Jpg]
Date: 15 Mar 2000 11:14:45
Message: <38cfb6f5@news.povray.org>
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And here it is... 3D in 3D. The only headaches might be from trying to look at
it.
I was very surprised to see the illusion didn't actually breakdown, although the
foreground building seems to have moved considerably and I set the mandelbrot
fractal background the same for both renders. All it really took to make this
stereogram was to rotate the camera (zoomed in with 'angle 0.5') a degree and
rotate the clipping objects a little too. Well, I did have to lower the camera
a bit, but I'm not exactly sure why; orthographic to perspective change of some
kind.
Cross-eyed for the left and center, diverged-eyes for the right and center.
Bob
"Rick [Kitty5]" <pov### [at] dialpipexcom> wrote in message
news:38cf797a@news.povray.org...
|
| > I wonder how Sascha's scene would look as a cross-eyed stereogram?
|
| I dont know if it would work correctly , worth a try tho (might give you
| more headaches than it worth tho!)
Post a reply to this message
Attachments:
Download 'waterfallillusion3D.jpg' (77 KB)
Preview of image 'waterfallillusion3D.jpg'
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On Wed, 15 Mar 2000 10:12:41 -0600 "Bob Hughes"
<omn### [at] hotmailcom?subject=PoV-News:> wrote:
>And here it is... 3D in 3D.
Cool. Thanks a bunch, Bob!
--
Alan - ako### [at] povrayorg - 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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If you look real closely you can see the overlap.
This is really just a double-tribar, isn't it...
Everything seems to have that tribar somewhere if you look.
--
___ _______________________________________________
| \ |_ <dav### [at] faricynet> <ICQ 55354965>
|_/avid |ontaine http://www.faricy.net/~davidf/
"The only difference between me and a madman is that I'm not mad." -Dali
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From: Bob Hughes
Subject: Re: Sascha/Escher Waterfall Un-Illusion [~102kb Jpg]
Date: 16 Mar 2000 03:48:37
Message: <38d09fe5@news.povray.org>
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"Alan Kong" <ako### [at] povrayNO-SPAMorg> wrote in message
news:8r60dsgunhk84lj2cagjaqjc18qh092v2e@4ax.com...
|
| >And here it is... 3D in 3D.
|
| Cool. Thanks a bunch, Bob!
|
| --
| Alan - ako### [at] povrayorg - 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
You are certainly welcome.
Bob
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From: Bob Hughes
Subject: Re: Sascha/Escher Waterfall Un-Illusion [~102kb Jpg]
Date: 16 Mar 2000 03:55:17
Message: <38d0a175@news.povray.org>
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I wasn't sure so I looked it up in one of my Escher books. It's actually three
tribars. The overlap for this one wasn't accounted for as much as in the first
non-stereogram images, I just wasn't going to spend as much time on it for these
quick smaller renders. The other isn't perfect either.
Bob
"David Fontaine" <dav### [at] faricynet> wrote in message
news:38D0221E.3B4D3708@faricy.net...
| If you look real closely you can see the overlap.
| This is really just a double-tribar, isn't it...
| Everything seems to have that tribar somewhere if you look.
|
| --
| ___ _______________________________________________
| | \ |_ <dav### [at] faricynet> <ICQ 55354965>
| |_/avid |ontaine http://www.faricy.net/~davidf/
|
| "The only difference between me and a madman is that I'm not mad." -Dali
|
|
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From: Rick [Kitty5]
Subject: Re: Sascha/Escher Waterfall Un-Illusion [~102kb Jpg]
Date: 16 Mar 2000 08:53:02
Message: <38d0e73e@news.povray.org>
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whoa !
that is 3d poster material, really cool
(nice 3 image sewuence - but cross eye is the only way to go)
Rick
"Bob Hughes" <omn### [at] hotmailcom?subject=PoV-News:> wrote in message
news:38cfb6f5@news.povray.org...
> And here it is... 3D in 3D. The only headaches might be from trying to
look at
> it.
> I was very surprised to see the illusion didn't actually breakdown,
although the
> foreground building seems to have moved considerably and I set the
mandelbrot
> fractal background the same for both renders. All it really took to make
this
> stereogram was to rotate the camera (zoomed in with 'angle 0.5') a degree
and
> rotate the clipping objects a little too. Well, I did have to lower the
camera
> a bit, but I'm not exactly sure why; orthographic to perspective change of
some
> kind.
>
> Cross-eyed for the left and center, diverged-eyes for the right and
center.
>
> Bob
>
> "Rick [Kitty5]" <pov### [at] dialpipexcom> wrote in message
> news:38cf797a@news.povray.org...
> |
> | > I wonder how Sascha's scene would look as a cross-eyed stereogram?
> |
> | I dont know if it would work correctly , worth a try tho (might give you
> | more headaches than it worth tho!)
>
>
>
>
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Bob Hughes wrote:
> I wasn't sure so I looked it up in one of my Escher books. It's actually three
> tribars. The overlap for this one wasn't accounted for as much as in the first
> non-stereogram images, I just wasn't going to spend as much time on it for these
> quick smaller renders. The other isn't perfect either.
I'm not talking about it being lined up. I mean I can actually see where the depth
changes.
--
___ _______________________________________________
| \ |_ <dav### [at] faricynet> <ICQ 55354965>
|_/avid |ontaine http://www.faricy.net/~davidf/
"The only difference between me and a madman is that I'm not mad." -Dali
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From: Bob Hughes
Subject: Re: Sascha/Escher Waterfall Un-Illusion [~102kb Jpg]
Date: 17 Mar 2000 06:58:44
Message: <38d21df4@news.povray.org>
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You see better than me then... but that's usually a given.
Bob
"David Fontaine" <dav### [at] faricynet> wrote in message
news:38D159DE.AAD3225E@faricy.net...
| Bob Hughes wrote:
|
| > I wasn't sure so I looked it up in one of my Escher books. It's actually
three
| > tribars. The overlap for this one wasn't accounted for as much as in the
first
| > non-stereogram images, I just wasn't going to spend as much time on it for
these
| > quick smaller renders. The other isn't perfect either.
|
| I'm not talking about it being lined up. I mean I can actually see where the
depth
| changes.
|
| --
| ___ _______________________________________________
| | \ |_ <dav### [at] faricynet> <ICQ 55354965>
| |_/avid |ontaine http://www.faricy.net/~davidf/
|
| "The only difference between me and a madman is that I'm not mad." -Dali
|
|
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