Written 6 January, 2012
I received an instant message from Ample Clarity, the creator of the one-prim piano I blogged about night-before last.
Ample thanked me for mentioning the piano and let me know the piano isn't mesh after all-- it's a well-done scultped prim.
So maybe complex one-prim mesh objects have a high cost after all. I don't have enough data to know.