In article <3d35eeac$1@news.povray.org>,
 "Mark Hanford" <ren### [at] blueyondercouk> wrote:

> Shouldn't I bother with bounding boxes any more?

You generally will only get an improvement over the automatic bounding 
with CSG difference or intersection...you can also get an improvement in 
certain cases with a large number of objects regularly spaced in a 
union, but that's a pretty special case.

In your case, because you had splitting of unions on, the bounding box 
was useless because the union was split into several separate objects.

-- 
Christopher James Huff <chr### [at] maccom>
POV-Ray TAG e-mail: chr### [at] tagpovrayorg
TAG web site: http://tag.povray.org/

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