On Friday 05 Feb 2010, John Denker wrote:
> Here’s the setup: Start the program as
>
> fgfs  --airport=KLXV  --metar="XXXX 012345Z 00000KT 99SM CLR
> 15/M01 A2992"
>
> Let the aircraft sit on the runway. There is no need to start the
> engine. Use the "v" key to cycle through the available views. The
> scenery looks normal until you get to the last view, i.e. the
> "model view". Then you will see that most (perhaps all) of the
> terrain is gone. Normally this view would show the aircraft
> sitting on the runway, but what you get instead is shown in
> figure 2. Cycling through the other views shows that their
> terrain is now gone, too, and does not come back.
> http://www.av8n.com/fly/fgfs/htm/bug-list.htm#fig-erosion-day
>
> If you do it at night, you find that the entire planet has been
> eaten away; the sun and stars are visible below the horizon, as
> shown in figure 3.
> http://www.av8n.com/fly/fgfs/htm/bug-list.htm#fig-erosion-night
>
> This type of failure is 100% reproducible chez moi. The degree of
> failure is somewhat variable, in the sense that sometimes all the
> terrain is gone but sometimes scattered remnants can be seen.
>
> Sometimes if you let the aircraft sit on the eroded terrain for a
> while, it goes through its “crash” ritual, wiggling and tumbling,
> which is pretty silly given that the engine was never started.
>
> It is common to get segfaults. I can provide detailed logs if
> anybody is interested.

Are those clouds on the horizon or is it distant scenery?  If it's 
scenery then funnily enough, back in Feb2008, I reported a bug 
where exactly the opposite seemed to be happening i.e. the scenery 
was ok up to a radius of about 12nm around the aircraft but was 
invisible beyond that.  Where the scenery was mountainous you could 
see it gradually appearing as you flew towards it; can you see the 
distant scenery (if that is what it is) disappearing as you fly 
towards it?

If you try flying higher, can you establish whether there is indeed 
a ring of scenery around your current position?

LeeE

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