FS Altitude like scenery cone

Hi,

I like to turn on tileproxy while on jet flights - it adds a real sense of realism from 35,000 ft.  But it would be nice if I could set up tileproxy in a way that leaves a cone of FS scenery around the plane, like FS Altitude.  This way, as I descend, the tileproxy scenery will appear to fade into the distance while the FS scenery takes its place. 

Has anyone else been able to set up tileproxy like this, or know of a way to do it?

Bryn.