Wasn't it iceqb who wrote:
>Warp <war### [at] tagpovrayorg> wrote:
>
>>   min_extent() and max_extent()
>
>Didn't think about that, but then I would have to declare the letter before
>using it in the difference, i don't suppose there's a way to do it in the
>text {..} block?

Not in official POV, but there are h_align_center and v_align_center
keywords in MegaPOV.

-- 
Mike Williams
Gentleman of Leisure

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