Aye, but try the same scene in Photoshop with the above-mentioned methods, and compare them. You'll find the postwork options MUCH more realistic and accurate. Also, Bryce only allows ONE type of blurring for DOF. With Photoshop (or PSP, I'm using PS just for my example) you can use hundreds of different DOF filters. KPT Equalizer, Gaussian, Flaming Pear Melancholytron, or ANY filter you want. You can even use this technique for non-DOF related filtering, such as motion blur and whatnot... Not to mention lighting techniques. Couple that with the VAST time differences, and you're back to our original result : DOF in Bryce is a waste.