It should be possible optimize complex object by using several unions to
make automatic bounding more accurate. I think that it maybe not useful to
combine some two finite objects to own union because bounding system takes
also some prosessing time. Question is, how many objects to put nested
union?

Even that automatic bounding create perfect bounding box it should be still
possible to optimize complex object rendering by splitting complex object
to several unions. How can I calculate how many unions to split complex
object?

Matti

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