Is it possible to get some already defined parameter as the value for some
variable? My reason to ask is I would like to keep the value output by my
exporter for some parameter (light position), and use it in a hand written
macro (SBenge SSS) This would allow to move the light and not having to always
modify the variable pov code by hand.

Say I have a light
light_source { <x,y,z> rgb <1,1,1>*3 spotlight point_at
<-0.281606,0.960535,-0.0901413> falloff 15 radius 12.75 fade_distance 30}

is there anything like
#declare
lpos = light_source.position
that would evaluate to lpos=<x,y,z> ?

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