I had to do this with a lot of triangles, because doing it with intersections of 
cylinders was way too slow.

parse time: 17 seconds
render time: 3 minutes 50 seconds

Comments welcome :)

(oh, I also attached an image made with the latest update of the 
polygon-greeble-macro :))

cu!
-- 
#macro G(b,e)b+(e-b)*C/50#end#macro _(b,e,k,l)#local C=0;#while(C<50)
sphere{G(b,e)+3*z.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1;
#end#end _(y-x,y,x,x+y)_(y,-x-y,x+y,y)_(-x-y,-y,y,y+z)_(-y,y,y+z,x+y)
_(0x+y.5+y/2x)_(0x-y.5+y/2x)            // ZK http://www.povplace.com

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Attachments:
Download 'cilinder-greeble.pov.txt' (8 KB) Download 'polygongreebles-update.jpg' (35 KB) Download 'cylinder-greeble.jpg' (64 KB)

Preview of image 'polygongreebles-update.jpg'

Preview of image 'cylinder-greeble.jpg'