As podium does not have DOF option, here is a small tutorial.
SU can export DOF as a 2d graphic. Its important to export a graphic without lines with all png cut outs information.
A. Lets set up the scene in SU
Now, play with this white fog, trying to describe the Depth Of Field. We need two scenes, one for forground another for background. Don't change fog colour, has to be white.
Here are the two 2d exports from SU.
Here is the set-up for export in SU and Podium
So, now we have two raw SU images and one podium render, all have the same resolution. Now lets open these in photoshop.
Select one of the 'DOF pictures' open channels palette, grab blue channel and drop it to podium render. Select the other and drop blue channel in podium render too.
When 'drug and drop' layers in photoshop and we want them be aligned, hold 'shift' key please.
Podium render picture contains 5 channels now, the 3rgb and two alphas.
Click on the upper RGB group so to select RGB only. Alphas should be unchecked.
Now Filters / Lens blur etc
You have to do this twice, one for foreground, one for background.
'Blur focal distance slider' works like real focusing on an accurate depth map. SU can't render such a map, so avoid to use it.
My advise: Don't use too much blur try to remember how real photos look like. In this example its supposed to be a night shot. So f 1.4 to 3.5 = strong DOF effect. A daylight shot at f 11-22 doesn't need DOF at all. Macro shots need lot of DOF effect though.
This was an old model in SU, one of my first photo-baked like renders. I used this example because of this cut out figure and the use of f 1.4 (lol). PP using lens distortion and toycamera analogcolor. Have fun.