I made my hourglass model using two cubes and four cones. I made bottom and upper base from cubes and set plastic shader and brown colour for them. Also I made center of the hourglass from two cones, one of them is upturned. I set their shader to glass and set their colour to very light blue. Finally I made sand, also from two cones. I made them plastic and yellow. I wanted to use 'hyp' primitive, but it couldn't get raytrayced. I could raytrayce it only when hyp object was the only object on the screen. When I was trying to add any other shape, hyp didn't rayrtace.