Glad that MO is up and running again.

Following the suggestion by Michael Murray one can also produce more than just one sudden smiley:

![alt text][1]

I guess, that a higher number of images is also possible. But probably some structure may be visible from other directions as well in this case. By the way: The problem seems to be a bit related to tomography...


  [1]: http://regularize.files.wordpress.com/2012/11/suddensmileys.gif