> #macro Go(Level)
>   #debug "1\n"
>   #switch (Level>0?Go(Level-1):0)
>     #case(0) 1  #break
>   #end
> #end

The problem here is that Go(Level - 1) is *always* evaluated, whether Level
> 0 or not, because POV-Ray doesn't use short-circuit evaluation.

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