The scenery camera is set up by the driver mode, which never runs when the
exe starts straight in the editor - the editor then copied an untouched
global camera and rendered a black view with only the UI on top. Entering
the editor as the startup mode now initialises the camera itself, falling
back on a view above the origin for sceneries that name no camera, and
resets the timers so the loading time does not land in the first frame.
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