> Does this mean those primitives are not rendered at all, increasing
> performance?
yes, it works a a depthfillter as well.
Its also all in the settings, the "layers" added to render loop cost also. 
Demo's like greenPlanet would not have been possible to run
on flash 9 without it.
Note that you also can pass an extra filter "MaxPolyFilter", if you set a 
value, not more than this amount will be rendered.

Fabrice


On Aug 2, 2010, at 11:14 PM, ComplexCortex wrote:

> Hey, my question is concerning performance for a website I'm building.
> Currently I have quite a few primitives, each one's Z value a set
> distance behind the previous one, and I am using a FogFilter which is
> an amazing effect I must say. I am wondering if this increases
> performance as the fog filter "provides automatic farfield filtering
> for primitives outside the furthest fog layers"
> Does this mean those primitives are not rendered at all, increasing
> performance?
> 
> Thanks.

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