[Genma Saotome]

I have a number of very tall building models, 10 to 20+ stories high where most of the floors are identical. My question about instancing is to ask if I'd get better performance by instancing all of those floors as a collection of single, stacked objects with respect to one or two textures therein also being used elsewhere in the model -- IOW a minor increase in drawcalls. In some of the larger buildings the number of polys instance would be > 2500.

Or to put it another way, is instancing away 2500 polys worth the price of one or two more draw calls?