I'm trying to render space scenes with a extremely sun. Rather than
fiddle around with trying to artificially add lens flares via NKFlare,
it occurs to me it ought to be possible to use the new EXR support to
render the image with the sun at its true brightness, and then
post-process the image to add bleeding around the bright pixels to
produce a similar effect. (I won't get a lens flare, but I'll be quite
happy with smearing around the sun to emphasise its brightness.)

Unfortunately I don't know enough magic Google terms to find out whether
such a thing is possible or what tools are available to do it.

What should I be looking for?

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