Christopher James Huff wrote:
> 
> > How do unions save anyway?
> 
> They generally don't. They are intended to make manipulating shapes
> more convenient. They are also useful because they can help you set up
> a bounding tree to speed tracing, but they don't help memory use at
> all.

Exception:  If all of the objects in a union will have the same
texture, apply the texture to the union.  That saves memory.

-- 
Rusty is rendering!

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