What I like here is that this particular 
piece of "code" creates this particular random shape sd viewed
from a particular direction.  I like the augury of it. 
I choose this specific case to display as an artistic decision just
as one chooses one photograph over another. 

I don't know if this code is the most efficient way to
produce this class of objects, in general.  But, as a general 
class of shapes, what I like is the ambiguity between rock shape 
and tool shaped.