Every sim has a "prim reserve" to allow for temporary prims and vehicles, which are not supposed to be counted against the prim limits of individual parcels, because they're temporary or (normally) just passing through.
Is this documented any where? Is there any way of knowing how many prims that overhead is? Would openspace prims have a lower 'prim reserve' than normal sims? Is this 'prim reserve' a fact, or just supposition?
For instance, if you have three sims in a row, A, B, and C, and sim B has all 15,000 prims used, could you drive a vehicle from sim A to sim C, passing through B? If you could, how many vehicles could go through sim B at the same time (assuming 30prims per vehicle)?
One final question - what defines a 'vehicle' in SL? Is it a physical object that uses the llSetVehicleType function in LSL? Or just any moving object that an avatar can ride? Or is a vehicle only a vehicle if at least one Avatar is sitting on it? All of the above? None of the above?
-Atashi
