David Fontaine wrote in message <3887AF4D.BB67D7EA@faricy.net>...
>> Because the 'right' vector may not be perpendicular to the other two.
Try
>> adding this to your camera:
>
>Does it default to something?


Yes, it defaults to <4/3,0,0>, but is modified when the look_at (but not the
'up') is changed so that it stays pointing in a direction perpendicular to
the direction the camera is pointing.

Mark

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