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That probably makes sense. Too bad we have no way of asking FSX how many drawcalls it performs.
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FSX Drawcall "batching" in FSX SP2
- Thread starter hcornea
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Edit: Arno beat me to the punch! (Who says he doesn't have much time for the forums these days)
Hehe. It was actually the first time since Tuesday that I checked the forums. But just at the right moment it seems
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I'm always surprised to see just how much time you put into helping the community, Arno. I'm afraid this will change soon, but then again: if your child keeps you from sleeping you might as well use the time for your flightsim tools. 
jtanabodee
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So your experiment suggest that we should clump the models together to be a bigger object. I did that in my project VTPS and it came out good. It seem to me that FSX is not good at many XML. But I don't know the reason either.
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Hi,
I think it is just the overhead of each individual placement we are seeing. That indeed can give trouble. In our Netherlands scenery we first placed over a million trees with XML placement. Performance was bad, now we moved to autogen and it is great.
As long as the object are close together it makes sense to group them in one MDL. But making the entire airport as one object will probably give you lower performance again. You need to balance it.
I think it is just the overhead of each individual placement we are seeing. That indeed can give trouble. In our Netherlands scenery we first placed over a million trees with XML placement. Performance was bad, now we moved to autogen and it is great.
As long as the object are close together it makes sense to group them in one MDL. But making the entire airport as one object will probably give you lower performance again. You need to balance it.