Am 15.06.2010 01:09, schrieb Alain:

> It's probably related to your spinner colony.
> If you remove a cylindrical piece from a building, you bounding box will
> encompass the building AND the complete cylinder. In that case, YES,
> you'll get some, possibly large, performance improvement.

Actually no - POV-Ray is smarter than that (at least since version 3.6, 
don't know about earlier ones).

The difference between an object obj1 and another object obj2 is 
modelled as the intersection between obj1 and the inverse of obj2; 
intersections' bounding boxes are computed as the intersection of all 
member objects' bounding boxes, i.e. if obj1 has any bounding box at 
all, then POV-Ray will never make the CSG's bounding box any bigger than 
that.

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