Mick Hazelgrove wrote:
> 
> Is there a way of  doing
> 
>     x (+ or -) y ?
> 

Could you be a bit more specific as to what scenario you have in mind?
Conditionals? Isosurfaces? Loop counters? ...?

-- 
Margus Ramst

Personal e-mail: mar### [at] peakeduee
TAG (Team Assistance Group) e-mail: mar### [at] tagpovrayorg

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