> I'm not a software engineer or a full-blown programmer,

I'm not the former ... some would debate that I'm even the later

> two) concerns the scene's parse time:
> 1) When the #if is finally 'processed', does POV-Ray (or any coding 
> language)
> have to search back through the entire code to find A?
> 2) If so, would the scene parse faster if the #if block was nearer to the
> #declared A?

don't think it matters, as after the scene file has passed the parse phase 
and read into memory, variables are referenced by a pointer to it's location 
in memory not a sequential search of the memory.

Jim

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