Le 18-02-13 à 20:54, Bald Eagle a écrit :
> Can you
> 
> a) mimic and actual camera lens with glass / ior?

Yes. Tou place an object shaped as the desired lense with the desired 
ior just in front of the camera. You can also add some dispersion.
This have been actually used.

> 
> b) look through a clear sheet that has a perturbation or normal that gets
> progressively stronger toward the edges?

You can use camera perturbation or use some actual transparent object 
with a perturbed normal or some actual displacement.
Then, it's just a question of modulating the pattern.
There are some samples scenes that show how it can be done.

> 
> c) look though a partially transparent image map of the scene that somehow gets
> rotated a little further the farther out toward the edge you get?
> 
> d) otherwise use overlapping image maps to imitate the photographic "circle of
> confusion"?
> 
> 
>

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