Et voilà!
My last Optical Illusion a la Escher 
I’m getting better (IMHO) I’ve managed to get SHADOWS too!!!
http://www.selleri.org/Blender/images/Stairs2.jpg
Comments?
Stefano
that is interesting
you really can’t see the steps in the staircase on the left side (the blend together), so that makes the image consideriably less creidible.
I could see the staris on the left just fine. Great job Stefano !
The shadows give this that little extra touch.
I posted the link to the Ter2Blend tute on my thread for you as well.
BgDM
I don’t know… I think that you should put the shadows from another direction because of the shadow in the lower right, it doesn’t seem to fall on part of the floor, see what I mean? Other than that it’s a wonderful picture.
Adues,
WeWa
Yet again, another cool illusion. I agree that the stairs on the left are a bit blured together, but their still visible. I like how the stairs are on top of a very high building far above the land. A few clouds surounding the tower would be cool. The shadows are what I really like. The image is much better with them. You wouldn’t get the same sense of depth without them.
Goo
:o yup yup, really nice !
I wanted to do something like this but I can figured it out how to do it. Very interesting.
One thing though, is it possible to make the edges less “curved” ?
Did you use Terragen for the background ?
Cheers.
malefico
whoa looks great! nice scene and illusion!..hey, what does IMHO mean?
Thanks! Ok:
Yes, that’s why I did steps tiled, so you can see, from the fact that tile lines are broken, that there are steps there too.
Thanks! I had a quick look and will read it soon. In this image I just used a Terragen image as a texture in background, but it would have been much better with a fully imported terrain 
No, I haven’t got your point, sorry, I think all the shadows that should be there are there, but I may be wrong
And thanks to Goo, malefico and imagrandpaboy. IMHO stands for In My Humble Opinion 
Stefano[/quote]
my favorite optical illusion so far