>> Thanks, I made it a 0 radius sphere with all suggested attributes
>
> Is there another use for a null than to keep track of a location after
> some transformations and/or linking other objects to that location? And
> isn't that something that can much easier be done in POV-Ray by
> declaring and vtransforming a vector?
>
> I'm just curious why you would need a null/empty object in POV-Ray.
>

There is realy no need to use a null object, but, for some, it's 
intuitively easier that way. Also, some peoples are not aware of, or 
comfortable with, vector transformations.

Once that object is #declared, you can get it's location using #declare 
Loc_Max = max_extent(Object_Name); and #declare Loc_Min = 
min_extent(Object_Name); and averaging the values. With a zero radius 
sphere, the two values are the same allowing you to use only one of the 
#declare.

Yes, it's beter to use a transformed vector. It use less memory and it's 
faster to access.

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