Drew wrote: > I'm building a 3-D model of an aircraft, and for some surfaces, I > decided to use 2-sided polygons to simplify things. However, when > FlightGear renders the object, one side of the surface gets shaded > exactly the opposite of what it should. Is this a known issue?
Indeed. Normal vectors only point in one direction. For a 2-sided polygon, this means that the "back" side gets lit using the same math as the "front" side. Don't use 2 sided polygons, they really aren't what you want. Andy _______________________________________________ Flightgear-devel mailing list [email protected] http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
