首先是一幅著名的画，相信GG们都看过

1.jpg
那么地球上有牛人用 乐高 (Lego) 积木把这个做出来了。
2.jpg

原文地址在：

http://gizmodo.com/gadgets/impossible/mc-eschers-waterfall-now-in-a-3d-sculpture-and-lego-too-285336.php

Quote:

Impossible
M.C. Escher's Waterfall Now in a 3D Sculpture and LEGO, Too
If you're a fan of artist M.C. Escher and his "Waterfall" woodcut, here's a scale model that somehow replicates that physically impossible structure. The $59.99 sculpture is six inches high, and will only be made in a limited edition of 500 units. At first we were hoping this was a working fountain, but the laws of physics wouldn't permit that. Take the jump for a look at the original Escher woodcut, and another Escher Waterfall made of LEGO.


This LEGO waterfall is from way back in 2003, but we thought it was quite clever nonetheless.

For reference, here's the artwork both these replicas are mocking:

TOPIC: e.c. escher impossible lego thinkgeek

是拍摄角度问题，用乐高的那个东西其实不是你想象的那样，其实是刚好那个角度看上去那样，如果换个角度看，那么那个图形就会看出有缺口。
这个东西有清华大学的学生也做出来过很多的不可能图形，都是这个原理！

Quote:

引用第26楼txbthy于2007-09-05 09:09发表的  :

这个模型很好作出来，其实只是我们的视觉误差，用的是[屏蔽]法，把前面挡住的物体部分去掉就可以了

正解！