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From skipt1@aol.com:
Now that is an elaborate and creative concept.  A more complex environment would improve this image.  This would include some variance in the vegetation and a more subtle transition between the ground and mountains.  How about a viewpoint from the tourists who are taking the pictures?  This would amplify the size of the crayons instead of making the Great Wall appear small.  Thanks for taking the time to provide a detailed scene and design description. 
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From povray@doublezero.uklinux.net:
Quite a good idea, but the picture could do with more work. It is too flat - textures are everything. The bits of rock at the back break up the background a bit, ruining the desired idea of scale.


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From shevlin@uic.edu:
The break in the wall is a bit too regular, and there could probably be some debris around it.  Some trees and plants would help, too.



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From hildurka@simnet.is:

Interesting tecniques with the sky, I´ll look into these. I´m not sure however that anyone could guess this is the Great Wall of China, the proportions make it look tiny compared to the landscape and the grass texture. And I´m not at all convinced from looking at you image that the Crayons are big, on the contrary, they look just ordinary sized.
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From renebui@aol.com:
Really not bad for a first time, but too small picture.

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From phenlikescheese@hotmail.com:
Very good idea! Very funny!

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From sshelby@shelbyvision.com:
Nice idea. I like the "Ray Doh". It doesn't look like 
enough to finish the job. Maybe it's compressed?