Warp wrote:


>   No, it's a property of the film (well, in this case the CCD of the
> digital camera, but it works the same way there). Sometimes when you
> have extreme overexposure at the border of a frame in a film, the
> brightness might even bleed partially to the adjacent frame.
> 
>   Without this natural property it would be impossible to photograph
> things which are smaller than what the film would normally record, no
> matter how bright these things are. However, as we know, if the thing
> is bright enough, it will imprint the film no matter how small it is.

Actually it is imperfections both in the lens and in the film/sensor. 
Even the best lenses have many different aberrations (like spherical 
aberration, chromatic aberration etc.) which cause a point in the scene 
render a circle/disc/ellipse/whatever to the film. Also the film is not 
perfect: there are many layers in the film. These cause inner 
reflections which spread the light that hits the film.

Question is: should POV-Ray try to simulate an imperfect optical system? 
And is antialiasing the right place to do it?

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