Couldn't resist (translate: procrastinate more important stuff) ;)

http://news.povray.org/povray.binaries.images/thread/%3C4df108a1%40news.povray.org%3E/

The reflecting version renders reasonably fast and
replaces your normal and finish with

normal  { bozo scale 0.001 }
finish  { specular 0.6 reflection 0.3 conserve_energy }

(note that micronormals + aliasing are not the optimal way
to do blurry reflection, just the shortest to type)

The transparent version is quite slow and uses

texture
{
    pigment { rgbf c + <0,0,0,1> }
    finish  { specular 0.6 reflection 0.1 }			
}
interior {ior 1.5}

replacing your cubie with

#include "shapes.inc"
#declare cubie = Round_Box_Merge(<0,0,0>, <1,1,1>, r)

to get rid of internal surfaces, and increasing the
spacing by a factor of 1.01 to get rid of coincident
surfaces.

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