focal blur is a great feature, but on the ideal plane the blur is absent and the
image is perfectly sharp, and this is not realistic.
In real imaging, the camera has an intrinsic blur due to residual optical
aberrations, and perfectly sharp images can never be obtained at any focus
I know that povray, with photons, can reproduce real optical phenomena directly
linked to aberrations, as caustics, but it cannot emulate real optical
aberrations *in the image itself*. (Am I right?) A good example of optical
aberration easily seen in real images is coma:
Is there a way to apply a basic blur to the image without external apps, to
avoid the unrealistic sharpness of objects in the focal plane?
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