If I have declared an object earlier in a file, how can I change the
object's transparency when I'm using it in a pov scene?  For example:
#include "colors.inc"
global_settings{assumed_gamma 1.0}
camera{location <2,3,-7> look_at 0}
light_source{<10,20,-10> rgb 1 parallel point_at 0}
plane{y,-2 pigment{color Green}}
#declare SillyObject=union {
   box{<-2,-2,-.5>,<2,2,.5> pigment{color Blue}}
   box{<-.5,-2,-2>,<.5,2,2> pigment{color Blue}}
   cylinder{y*2,y*2.5,.25 pigment{color Red}}
}
object{SillyObject //transmit .5 <==this is what I've been trying to use
}

I would define a variable for SillyObject's pigment, except in real life
SillyObject is defined in an include file, and also its components are
different colors, so it isn't convenient to make its transparency dependent
on a variable.  Can I change aspects of its color in the scene without
having a variable to refer to the color?
Thanks,
Kneb

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