BOKEH EFFECT IN VRAY SKETCHUP . . .

Bokeh effect is defined as “the effect of a soft out-of-focus background that you get when shooting a subject, using a fast lens, at the widest aperture, such as f/2.8 or wider.” Simply put, bokeh is the pleasing or aesthetic quality of out-of-focus blur in a photograph. 

V-Ray also offers a feature to simulate this type of effect: enable the depth of field and just flag on “blades” 

Trial 1 | Aperture (f number) 8.0 | Shutter speed 300

 

Trial 2 | Aperture (f number) 1.0 | Shutter speed 300

Trial 3 | Aperture (f number) 2.0 | Shutter speed 125

Trial 4 | Aperture (f number) 2.0 | Shutter speed 60

3 important things to affect DOF "Depth of field" 

• Focal length
• Distance from the subject - CameraDistance.rb
• Aperture (f-number)

 Adjust or increase Blur DOF effect

• Using a bigger Focal length
• Reducing the distances from the subject (actual distance of camera to object)
• Decreasing f-number

Note : The more you decrease the value of f_number more strong effect in DOF "Depth of field"   -  -

EV (Exposure value) a combination of a shutter speed and an aperture "f-number" setting, independent of any ISO setting.

EV (Exposure value)
 
I have lots of trial and error...correct me if I'm wrong about the setting and I need a comments and more suggestion if you have. :) GOD BLESS