"alphaQuad" <alp### [at] earthlinknet> wrote:
> Autostop: now there's a mindbender
> Something about objects with holes.
> One of those, "test to see if it saves time or does what you want it to do"
> features.

I always use autostop.  A hole in the middle of an object won't cause autostop
to err because autostop doesn't kick in until the first hit.  A disjointed
union will not be a problem because it is treated as separate objects--unless
split_union off is set for that object, and i don't set split_union off for
disjointed unions.

Disjointed differences, isosurfaces and polynomials could cause autostop to err.

Now, split_union off is definitely a "test to see if it saves time" feature.  My
experience has seen this double the rendering speed or slow it down 10 times,
depending on how it was applied.  My tentative recommendation: apply it to
Round_Box_Union(), Round_Cylinder_Union(), and unions of similar complexity,
but don't apply it to anything more complex than those.

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