Oh, yes- once you scale the octahedron at 1.414*y, since it is perfectly
symmetrical, you can then use one more cube and trim it into a perfect
cuboctahedron like this:

// start of POV code

#declare octahedron = intersection {
  object {box{<-2,-1,-1>, <2,1,1>} rotate 45*x}
  object {box{<-1,-1,-2>, <1,1,2>} rotate 45*z}
  pigment {color Green}
  finish {roughness .1 specular .1}
}

object {intersection {
  object {octahedron scale 1.414*y }
  object {box{-1, 1} rotate 45*y pigment {color Green} finish {roughness .1
specular .1} }
} }

// end of POV code

  Note the attached image.

Cheers!

Chip Shults
My robotics, space and CGI web page - http://home.cfl.rr.com/aichip

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