I've just implemented a (hexagonal) DOF effect into our game :


(as always, click to view in full resolution, you can't really see the effect in the downscaled picture)

It produces some artifacts, esp. with forward rendering, but the result is not bad in my opinion.
It's going to be an optional effect (some ppl don't like it...)

These are by the way our max settings, I think it's good enough.
The only thing that is still missing is shadowmapping for the sun - but in that shot it's not needed.