I generally apply DoF in post work .

I've used the bryce DoF using the select an object method and it's not bad, but to get good quality blur you need the higher rpp or to go up in res for the overall render. I just find it quicker to render the image, render an object mask and use the object mask to contol the blur in the GIMP.....

----------

Toolset: Blender, GIMP, Indigo Render, LuxRender, TopMod, Knotplot, Ivy Gen, Plant Studio.