Like they said, basic answer is Bryce does not perform a complete boolean and take the 3 objects and turn it into just one, it stays as 3, always. Booleans can increase render time somewhat in Bryce, since it does not perform booleans completely and it has to compute all the positives and negatives, in addition to all the normal attributes. Remember to decrease the resolution of your wireframes, that will help with screen refresh times. AgentSmith

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