I love these kinds of art work.

These are some art works I have found by Edgar Mueller, as you can see he does it in publis spaces on concrete ground and makes it look so realistic.

(H-Ref 1).


(H-Ref 2).

This video shows how he does it.

(H-Ref 3).

References:

H-Ref 1: VERUM SERUM
http://www.verumserum.com/?p=3938
Accessed Tuesday October 6, 2009.

H-Ref 2: Wordpress
seaneyb.wordpress.com/2009/04/
Accessed Tuesday October 6, 2009.

H-Ref 3: Youtube
http://www.youtube.com/watch?v=3SNYtd0Ayt0
Accessed Tuesday Octover 6, 2009.