Alain wrote:
> If so, fist, you create a reference object. Is must be a shell slightly 
> smaller than the hourglass and have a relatively small thickness. That 
> object will have the shape of the sand.

Also, unless your sand is semi-transparent or something, you can't see sand 
inside other sand. So you can build a punt[1] on the bottom to reduce the 
number of independent grains.

You might also want to perhaps do something to make sure you don't have 
grains floating in mid-air, or to make a higher hill in the middle in order 
to make it look like it poured in through the neck of the glass.


[1] http://www.glassblower.info/images/punt-indentation-wine-bottle.jpg

-- 
Darren New, San Diego CA, USA (PST)
   The question in today's corporate environment is not
   so much "what color is your parachute?" as it is
   "what color is your nose?"

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