Ahh, good point.  The messages I receive from both versions say that
there are 2 objects in the scene, but my bounding threshold is set for
3.  Perhaps if I lower the bounding threshold, more efficient bounding
will kick in?

--Library Man



"hughes, b." wrote:
> 
> "LibraryMan" <mrm### [at] attnet> wrote in message
> news:3DDD4043.CD432E69@att.net...
> > the version with lots of difference's
> > rendered faster than the version that was all unioning and translating.
> > Version 1 was a single large box object with a stone texture, and lots
> > of long narrow cylinders differenced from the visible surface to
> > simulate the look of the wall being built from individual blocks of
> > stone
> > Version two was built from iterations of the actual individual block of
> > stone, translated to achieve the "staggered" look.
> >
> > Why might this have happened? It seems contrary to my initial assumption
> > (which admittedly might have been in error...)
> 
> Probably due most to number of visible objects and gaps inbetween. I think
> the differenced object might only be seen as a single bounded entity whereas
> the other might be seen as a group or collection of bounded objects. But I'm
> not certain of this.

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