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From jknepley@chisp.net:
Outstanding.  Simply outstanding.

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From agage@csee.usf.edu:
Nicely done!  The brick texture (and that used in the columns) still feels
a little plastic, but the effect is perfect.
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From xeo@home.com:
wow. I can't believe you managed to model it so well!

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From witoslaw@kki.net.pl:
I saw the original picture a few days ago and was thinking it would be quite
hard to make a 3D scene like this. And here I have it! IT'S GREAT!!!

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From jerry@hoboes.com:
Very nice brick-laying job! Similar good job on the roof tiles; the walls of
the building looks naked in comparison. I'm afraid I don't see the illusion,
however. It just looks like the water is trying to flow uphill to me.

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From Sean_Hamilton@amrcorp.com:
One of my top three, this is an excellent representation of Escher's idea.  
Not only does the theme present itself well, but the optical illusion is 
fully present.  Very Cool.

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From jasondinger@hotmail.com:
 you got extra points because i am a big fan of m.c.escher. this has an overall
smooth appearance. i think the warm "earthy" colors add a lot.


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From gregj56590@aol.com:
Not very original: I seem to remember another entry in IRTC or somewhere else
just like it: just kidding! ;-)
Great to see favorite work of art raytraced! Water is amazingly well done. I
think you have a moral obligation to post to povary.binaries.animations a
flyaround of your piece! 
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From vogelap@email.uc.edu:
I love Escher. This image will go on my desktop! Kudos!

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From klynn@uswest.net:
Would make a cool animation!

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From bonsalva@bellsouth.net:

Very good, I think this is my favorite.  I've thought about doing an "Escher"
but I didn't think that it could be done without cheating.Good Job!
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From bsieker@techfak.uni-bielefeld.de:
Truly brilliant! Using a parallel projection does not really disturb the
overall impression, I believe it would be almost impossible in perspective
projektion.
Only down point is perhaps that the lower part of the waterfall is blurred a
bit too strong. This seems to be the only part where there is a slight
discontinuity.

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From pdolan@jps.net:
MARVELOUS! FANTASTIC! ACOLADES UPON YOU! (I love escher - this is great!)  Good
job on the falling water!

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From johnson@pharmacy.arizona.edu:
What can I say, I'm a huge Escher fan...This would have been my pick for best
image if runnig.jpg wasn't in this round.

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From jaime@ctav.es:
I would be pleased only with a "no_shadowable" statement! ;) Superb tricks!

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From djohnston@iname.com:
This is an excellent image. The modelling is fantastic and the  work to
produce the illusion is exceptional. The technical aspect of the image is
amazing. And when you compare it to the original, it's even more amazing.
Great work. I look forward to seeing more work from you.

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From gmccarter@hotmail.com:
I usually like original works better than derivatives, but hey, my image is a
derivative too!  Anyway, this is really well done.  It has a convincing
modelled/3D look, which makes the paradox all the more difficult to figure
out.
Great modelling on the bricks.  The waterfall, particularly where it first
begins to fall, is excellently done.  Fine work all around.
Please don't apologize for your (excellent) English.

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From ethelm@bigfoot.com:
This is an excellent representation of the Waterfall. We have all Eschers books
and love the way he worked.

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From chipr@niestu.com:
Beautiful rendering of Escher's scene.  Excellent technical work getting it to
look right.  I'm dying to go over the source in detail.


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From r@flametree.hunterlink.net.au:
this is great, my favourite. I still can't beleive it's possible. it is
excellent!
Notable for lighting, modelling, composition, textures


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From r@dialup-78-168.infoserv.net:
I love Escher! of course, I loved to see this wonderful scene that captures the
"escherence" (Escher escence). I wonder how much time did Sascha spent working
on this to make it look so well!
Notable for originality, modelling, composition, textures


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From r@dc2-modem1283.dial.xs4all.nl:
Absolutely marvellous. You found a great solution for the question 'how can one
make an impossible figure in 3D?' for impossible figures are actually only 2D
pictures of a simulated space. I regret to say the background is a bit dull. I
believe the original Escher litho has a mountainous landscape on the background
(?). I think a simple heightfield with a less rainy sky would have looked
better, but I still think this is a great image.
Notable for originality, modelling


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From r@goldach.informatik.uni-konstanz.de:
Finally! My favourite image of Escher rendered with POV-Ray. I hope that you
consider adding the original background and the missing bottom...