Congratulations for good work. You did well with the light which is the most important for a quality render. For the depth of field technique or so called
bokeh effect I will try to give some simple tips without claiming a high professional level. Things are very close to photography and if you shot with a DSLR camera in DAZ the same rules apply.
1. I made a simple scheme. The object you want to be in focus and attract the viewer's eye is placed in the focus 'box' ---> Start - End. Anything outside of it will not be in focus and will be slightly blurred-bokeffect. Exactly how blurry objects will be depends on the f/stop option. Usually values 22/44 or 66 are sufficient. Here the rule of experimenting and seeing the result applies.
2. It is important that the background of the scene is at least 1.5-2 meters away from the model. This will give you a nice blurred background.
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3. If you want to focus on any part of the model a lot and affect the viewer you need to lower the focus 'box' ---> Start - End extremely
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4. There is a lot of information on the net and the technique is not very complicated. But always
play with your sliders and fool around with a side camera how to resize the focus 'box'. Quite often when moving the camera and adjusting the focus, you get a shift and things don't work as you expect. Here are some useful videos:
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5. Very good effect when you do close-up scenes
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and
Dumitas's original from which I drew inspiration
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