At 04:22 PM 12/14/2001 +0200, you wrote: >Once upon a time, you were sitting and writing: > > > Would it be possible to model skyglow in FlightGear? That way you could > see > > when you're approaching a city, even when you can't see it for > mountains etc. > >Interesting question. You could either try volumetric fog rendering >(yeah sure- on my GeForce9000), or seek for the right OpenGL technique. > >I'm not a big expert in such phenomena (so correct me if I'm wrong), but I >guess fog and particles (and clouds) are the reason for the sky glow. One >can render a thin yellow cloud layer to create a nice illusion. > >The city itself is a huge lightsource which should be used to illuminate >the terrain (and objects) around. > >Hope it helps to define a more accurate problem :)
You don't need clouds or fog; even "clear" air has enough scattering to make skyglow visible over the horizon. Quite a lovely effect, and it would be worth some programming effort. As you say, it would take some ultra-streamlined rendering. I'm doing an animation project on a .45 auto pistol, and the rendering times on the muzzle blast are pretty hefty. rj _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
