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Indeed, this has been done before, but for a little story I have in my mind,
I wanted to test a couple of tricks in Moray. The result is rather nice I
believe, so I thought I would share.
Thomas
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Attachments:
Download 'eschertriangle.jpg' (54 KB)
Preview of image 'eschertriangle.jpg'
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Ah yes, the power to bend the mind...
Not the colours I would have chosen, but still. ;-)
I wonder how long it will be before somebody animates this stuff? :-P
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Thomas de Groot wrote:
> Indeed, this has been done before, but for a little story I have in my mind,
> I wanted to test a couple of tricks in Moray. The result is rather nice I
> believe, so I thought I would share.
The shadow does not match the figure too well.
Perhaps you should create a fake shadow which at least seems to
match the figure?
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"Warp" <war### [at] tag povrayorg> schreef in bericht
news:440036d8@news.povray.org...
>
> The shadow does not match the figure too well.
> Perhaps you should create a fake shadow which at least seems to
> match the figure?
True for the third branch of the triangle... There is already one fake
shadow present here. The third one is not easy, but feasible, yes.
Thomas
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"Orchid XP v2" <voi### [at] devnull> schreef in bericht
news:44002e22$1@news.povray.org...
> Ah yes, the power to bend the mind...
>
> Not the colours I would have chosen, but still. ;-)
>
Ah, colours! Well, I want the triangle to be wood anyway. The tiles can be
anything.
> I wonder how long it will be before somebody animates this stuff? :-P
Hmm... not easy because you have to align correctly two aspects of the
triangle at the same time in reference to the camera: The alignment of the
branches, and the cutting plane that creates the illusion. I won't try that!
To complicated for my shaky capabilities :-)
Thomas
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>>I wonder how long it will be before somebody animates this stuff? :-P
>
> Hmm... not easy because you have to align correctly two aspects of the
> triangle at the same time in reference to the camera: The alignment of the
> branches, and the cutting plane that creates the illusion. I won't try that!
> To complicated for my shaky capabilities :-)
If you animate it, the parallex will show how far each point *really* is
from the camera. I'd like to see somebody pull _that_ off without
breaking the illusion. ;-)
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I had been following another stream of thoughts, but this fools the eyes
much better!!!
Thomas
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Attachments:
Download 'eschertriangle.jpg' (47 KB)
Preview of image 'eschertriangle.jpg'
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"Orchid XP v2" <voi### [at] devnull> schreef in bericht
news:440062b7$1@news.povray.org...
>
> If you animate it, the parallex will show how far each point *really* is
> from the camera. I'd like to see somebody pull _that_ off without
> breaking the illusion. ;-)
Yes indeed, and I think you will have to adapt the "thickness" of the limbs
continuously too...
Thomas
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Among other things, Thomas de Groot saw fit to write:
> Indeed, this has been done before, but for a little story I have in my
> mind, I wanted to test a couple of tricks in Moray. The result is rather
> nice I believe, so I thought I would share.
Hmm... looks familiar[*]
As Warp mentioned, the shadows are a bit strange, but I don't know if you
can have realistic shadows for an impossible object. Anyway it seems you're
using a perspective camera, and that's a good thing.
[*] See signature ;-)
--
light_source{9+9*x,1}camera{orthographic look_at(1-y)/4angle 30location
9/4-z*4}light_source{-9*z,1}union{box{.9-z.1+x clipped_by{plane{2+y-4*x
0}}}box{z-y-.1.1+z}box{-.1.1+x}box{.1z-.1}pigment{rgb<.8.2,1>}}//Jellby
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"Thomas de Groot" <t.d### [at] internlnet> wrote in message
news:440067ce@news.povray.org...
>I had been following another stream of thoughts, but this fools the eyes
> much better!!!
Does indeed. A well done illusion. I wonder of the shadow of the short
horizontal piece could actually be moved away at the right side? The other
half of its illusion would put it into the air instead of being flat against
the tabletop. I'm probably not thinking of a good alternate placement for
that shadow though. It looks fine to me now.
Bob H
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