kmac99 nous apporta ses lumieres en ce 2005-03-14 06:55:
> Some time ago I asked about creating an animation where a single object
> increases in size to which I received great answers.  I've just returned to
> this project and noticed that the perspective doesn't appear to be correct
> for a cube (looking at the centre).  As the size of the cube increases the
> vertical lines begin to converge at the bottom - camera slightly above and
> cube rotated.  Are there general rules to avoid such problems?
> 
> Thanks.
> 
> 
This convergeance is an effect of perspective and is as it should be. A real
photograph will show 
the same thing.
As kurtz said, an ortographic camera will elliminate this effect, while flatening any
perspective.
Another way is to use a spherical camera and chosing carefully the vertical and
horizontal angles. I 
suspect that those angles will change with the position and orientation of the camera,
and probably 
with the size of the object.

Alain

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