Now I am _really_ confused. I can verify your result. This confuses me.
But what confuses me the most are the results of my own experiment.
  In this scene changing the value of the 'Size' identifier scales the
whole scene. With povray the scene renders identically no matter what value
of 'Size' you set, as I expected. To my surprise megapov does it too! So now
it works fine! Now I am confused. What the **** is happening here? Why my
previous test scene, which I posted to p.b.images didn't seem to work? Can
someone explain me, please? :)
  Here is my test scene:

#declare Size=1;
#debug concat("Size=",str(Size,1,0),"\n")

camera { location -z*4*Size look_at 0 angle 35 }
light_source { <100,200,-150>*Size, 1 }
sphere
{ 0,1
  pigment { rgb x } finish { specular .5 }
  normal { bumps .5 scale .1 }
  scale Size
}


-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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