What steps will reproduce the problem?

--lat=37.637855 --lon=-122.414915 --altitude=656 --heading=113 --fdm=ufo

aircraft is stopped.  zero airspeed, zero rate of turn, etc.

The choice of aircraft doesn't seem to matter;  this is 100%
reproducible chez moi using the default c172p, the pa24-250,
et cetera.

Zoom in the view;  FoV 15.5 will do; 12.5 is better; 7.7 is
even better, if you have good control of the pitch/tilt and 
view angle.

Change the view angle, either by pitching the entire aircraft
or by simply tilting the pilot's view angle relative to the
aircraft.

What is the expected output? 

Scenery should not change.  The ray from each object to the
camera image plane should stay the same, except to move to
a different point in the image plane, when the camera is
tilted.

What do you see instead?

For some tilt angles, the taxiway signs alongside taxiway
charlie are dark, while at other title angles they are
lit.
  http://www.av8n.com/fly/fgfs/img48/taxi-signs-off.png
  http://www.av8n.com/fly/fgfs/img48/taxi-signs-on.png

I cannot imagine what could be causing this.

==================

The same phenomenon is seen during normal flight, but is
harder to reproduce and document.


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