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FSX Object placement advice

preynolds

preynolds

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unitedkingdom
Hi,

I currently have a bgl library of just over 100 custom signs, all being placed separately using xml.

Would there be any performance benefit in merging the individual gmax models into one and exporting as a single mdl so there is only one refpoint?

I will also be placing a large amount of 3D taxi edge lights the same way, if it is beneficial.

Many thanks

Phil
 
Hi,

Some merging might help. But putting all signs of a big airport in one MDL will probably give you less performance. It is a balancing act. Too many object placements hurt performance, but MDL files that cover an entire airport also do.

Too many placements hurt performance because of the overhead of doing each separate placement. But if you have on big MDL than the scenery engine will always have to draw all signs, even those that are not in view, when part of the object is in view. So you need to balance between those two.

In general I try to only group objects that are close together.
 
Hi Arno,

And I guess putting them all in one mdl will also require some tweaking of the altitude of the objects to ensure they still sit on the ground, due to the curvature of the earth in FSX?

Phil
 
Hi,

I think so. I never tried such big MDL files in FSX. But I indeed think they would start floating at the edges.
 
preynolds said:
Hi Arno,

And I guess putting them all in one mdl will also require some tweaking of the altitude of the objects to ensure they still sit on the ground, due to the curvature of the earth in FSX?

Phil
Click to expand...

....yap...they do:p
 
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