Am 25.01.2016 um 19:15 schrieb Cousin Ricky:

> I almost immediately realized why my torus-cylinder merges showed this artifact,
> which is why I never reported this as a bug.  But bug or not, it is annoying, so
> it is fixed in RoundEdge 1.3.1.

... and it is also fixed (kind of, that is) in POV-Ray 3.7.1 ;)

You may want to change your RE__torus macro as follows:


#macro RE__torus (RMajor, rMinor, Use_merge)
  #if (RMajor * 2 < rMinor & Use_merge)
    #if (RoundEdge_Inc_Temp >= 3.7.1)
      torus { RMajor, rMinor merge }
    #else
      merge
      { difference
        { torus { RMajor, rMinor }
          sphere { 0, re_R }
        }
        sphere { 0, (re_R + rMinor) / 2 }
      }
    #end
  #else
    torus { RMajor, rMinor }
  #end
#end


Specifying the "merge" keyword after the major & minor radii of a torus
will cause interior surfaces of a spindle torus to be suppressed.

The "difference", "intersection" and "union" keywords also work there as
you might expect (though "union" is only included for completeness, as
it's the default anyway).

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