This is the last render of my chessboard. If you have a good memory, you’ll remember that the dof was plain bad. When trying to render with REAL dof, it took 240 hours on my poor machine(P2 300 64 RAM) on lightflow. Since I have a bought a new machine (P4 1900 256 RAM), I tried again, and it took only(??) 12 hours.
I left left the old render so you can compare.