Hi Trey, I just finished doing an auditorium with around 1500 seats. I did the chairs as blocks in Autocad and then inserted the dwg into viz and it read them as instances, so what were around 300mb of chairs (I checked) ended up being around 5mb, much more manageable. You will still have the polygons to render but it is much easier to move around.
I don't know how to upload an image here, but I even used a bit of radiosity,not on the chairs though.
Hope it helps
Gonzalo
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