Paul Surgeon writes:
> 
> Is there any documentation on the binary scenery file format and how 
> FlightGear/SimGear renders the terrain?
> 
> I've searched through all the docs and have not found anything.

The scenery docs are a little skimpy but maybe this will help get you started
< outdated but still essentially correct >
http://www.flightgear.org/Docs/Scenery/SceneryGeneration/SceneryGeneration.html

as far as the binary format goes the best doc is probabably the source
SimGear / simgear / io / decode_binobj.cxx and  sg_binobj.hxx
It is a very straightforward binary representation of our earlier ASCII format
which was *very* similar to a subset of the WaveFront .obj 3D format
http://astronomy.swin.edu.au/~pbourke/geomformats/obj/

HTH

Norman

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