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

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

> Is this right?

What you are experiencing is called coincedent surfaces. POV-Ray
cannot tell which surface to evaluate as inside or outside because
the surface to the two boxes line up perfectly. This is not a bug
rather a limitation of raytracing.

Change your second box to:

      box {
         <0,5.75,0>, <.2501,6.001,4.501>
      }

and it works properly.

-- 
Ken Tyler -  1200+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/

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