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    3 questions

    1) does prefab help performance or only speed up the process of placing things around?

    2) I want to try using Massive LOD, but how do you create one? lets say I have a group of buildings with lots of little props on them like AC unit and billboards..etc. The lighting situation is sunlit around 4pm which create lots of unique shadow shape. How do i go about creating a LOD that matches all those buildings details including shadow shapes so the LOD doesn't "pop"? the only thing i can think of is take several screenshots and recreate it in my 3d package manually. that sounds kinda painful so I was wondering if anyone have a better idea.

    3) i notice that every mesh have a "use for instancing" check box that is by default OFF. shouldn't everything be instance? wouldn't it be better for performance? why would it be OFF be default?
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