aleks,

"there is some jagginess around her hair on the shoulders and on that vertical white spot left from her head. are those compression artefacts or is this the firefly blur-algorhythm (i think i remember dimly that i saw already those things on another dof experiment)? "

The "white spot" jagginess is from the background picture used....... I used only a small part of the image in my scene. I'm not sure what is causing the others. There are many variables in the FireFly engine in addition to compression artifacts that could produce jagginess.

It's early days yet, but so far I'm impressed with the Firefly engine. But it seems to have learning curve similar to the one I went through last year with the finalrender engine in max. :)

Ian