Beautiful image. 


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>Really very shocking! I must have seen somewhere someplace how it works: 
>some kind of overlapping partial images ?
>
>Do you know M.C. Escher's graphical work? Famous 'Waterfall' perpetuum 
>mobile type? Now if you could animate THAT, that would really be 
>astounding :-)

It has been animated...IRTC animation entry for April-July called "That's
Impossible"..

Oldstench................

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Reusser <reu### [at] chorusnet> wrote:

>Well, I got the idea from illusionworks.com and I just had to try it.
>What do you think?  Is it more confusing that it's 4x4 and 3x3 at the
>same time or that it eternally de/ascends?  Is it worth developing into
>a scene?
>
>My other question is this.  Is there any way to 'fake' perspective?  Can
>you map a texture so that it decreases in size with distance?  I can't
>take much more of this orthographic stuff...
>
> - Rico

Great picture...any possibilty of posting the scene file? I am really
interested in your lighting and radiosity.
Oldstench................

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In article <lharjt4itm4gpnhu45a7ch4go67dtej8il@4ax.com>, Oldstench 
says...
> >Do you know M.C. Escher's graphical work? Famous 'Waterfall' perpetuum 
> >mobile type? Now if you could animate THAT, that would really be 
> >astounding :-)
> 
> It has been animated...IRTC animation entry for April-July called "That's
> Impossible"..
> 
> Oldstench................
> 
This one: http://www.worldofescher.com/gallery/WaterfallLg.html ?
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Oldstench wrote:

> Great picture...any possibilty of posting the scene file? I am really
> interested in your lighting and radiosity.
> Oldstench................

Well, okay.  I cleaned up the code quite a bit.  Now there's a variable so
you can change the height of each step and have the camera angle calculated
automatically, but I didn't do too much about optimizing the features.  To
me, as long as it is finished by morning, it doesn't make too much of a
difference whether it takes four hours or eight.  Also, the lighting just
consists of a yellow/orange area light with high intensity, and a blue sky
sphere for radiosity.  That's about the extent of what you'll find in the
file, but I'll post it in p.b.s-f.

 - Rico

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On Fri, 29 Jun 2001 18:52:05 -0700, Ken wrote:
>
>
>Kari Kivisalo wrote:
>> 
>> I remember seeing more complex version of this made in pov.
>
>I think it was an IRTC entry by Sonya Roberts (BIG Maybe).

I think I've also seen a rework of that stuff by our very own 
Bob H not sure which url, but they're both his:

        http://users.aol.com/persistenceofv/all.htm
        http://members.aol.com/persistenceofv/anims.htm

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"Steve" <ste### [at] zeroppsuklinuxnet> wrote in message
news:slr### [at] zero-ppslocaldomain...
> On Fri, 29 Jun 2001 18:52:05 -0700, Ken wrote:
> >
> >Kari Kivisalo wrote:
> >>
> >> I remember seeing more complex version of this made in pov.
> >
> >I think it was an IRTC entry by Sonya Roberts (BIG Maybe).
>
> I think I've also seen a rework of that stuff by our very own
> Bob H not sure which url, but they're both his:
>
>         http://users.aol.com/persistenceofv/all.htm
>         http://members.aol.com/persistenceofv/anims.htm

You made me go look, I never uploaded it to the web space FAIK though.
Wasn't my perpetual waterfall by Escher model anyhow, was one from a 3D site
with free models.  I guess I only posted the rendering to
povray.binaries.images or the animation to p.b.a. because I remember some
comments on it.  Mainly about that perspective trouble.

Noticed now that I'm not uploading anything lately since this brought that
to my attention, pretty pitiful of me.

Bob H.

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On Sun, 1 Jul 2001 03:41:06 -0500, Bob H. wrote:

>You made me go look, I never uploaded it to the web space FAIK though.
>Wasn't my perpetual waterfall by Escher model anyhow, was one from a 3D site
>with free models.  I guess I only posted the rendering to
>povray.binaries.images or the animation to p.b.a. because I remember some
>comments on it.  Mainly about that perspective trouble.

I think I remember a steriogram version too. 

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"Reusser" <reu### [at] chorusnet> wrote in message
news:3B3E10D6.F2E2B1EE@chorus.net...

<snip>

Thanks - got a nice big version for my desktop now. One curiosity, when you know
what to look for, the radiosity gives the game away, since it is missing on the
fake join (i.e. the face of the step casts no colour onto the next step).

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Tom Melly wrote:

> Thanks - got a nice big version for my desktop now. One curiosity, when you know
> what to look for, the radiosity gives the game away, since it is missing on the
> fake join (i.e. the face of the step casts no colour onto the next step).

Hmmmm.  Didn't think about that.  If I had really been trying, I would have used
megapov's no_image statement on a fake step above the highest.  Would that work or
would it be no better than no step?  If not that, it would be possible to just put
a step cut in half so it could cast a shadow on the highest step while also showing
radiosity.

 - Rico

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