I don't recall merge ever acting this way before. I'm getting a reverse
intersection clipping with the following:

#include "colors.inc"

camera {
   location <-2.5,6.5,4.1>
   look_at <-3.05,6,4.5>

}

light_source {
   <50,50,-10>
   color White
}

//union {
   merge {
      box {
         <0,0,4.25>, <.25,6,4.5>
      }
      box {
         <0,5.75,0>, <.25,6,4.5>
      }
   //}
   cylinder {
      <0,5.9,4.375>, <6.5,5.9,4.375>, .06
   }
   
   translate <-3.25,0,0>
   pigment {
      color Blue
   }
}

In the source above, the objects are clipped where they meet.

Comment out the 'merge' line and uncomment the 'union', and it appears as
I would expect--two blocks with a cylinder coming out of them.

Uncomment everything, so that the blocks are in a merge but the cylinder
is in a union, and the blocks get clipped where they meet, with the
cylinder appearing in the space inside.

I put an example up at http://cerebus.acusd.edu/merge/ . I'm getting this
in both the official compile for Macintosh (3.1g.r1) and the unofficial
compile (November 17, 1999).

Is this right?

Jerry

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