Thorsten Froehlich wrote:
> POV-Ray does not get confused at all!  ...  Consequently, if 
> look_at - location yields a direction vectors also on the y-axis, there 
> is no valid cross product and thus look_at will not work as expected.

Doesn't that constitute confusion, even if the confusion itself is 
completely expected?  If there is no valid cross product, and the 
look_at isn't working as expected, the end result will be the software 
not knowing exactly what to do, i.e. being confused.

-- 
Tim Cook
http://home.bellsouth.net/p/PWP-empyrean

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