V-Ray for Rhino Manual - Rum

Depth of Field
What's Depth of Field?
Depth of field refers to the amount of an image which is in focus and the amount which becomes blurry. In
photography it is impossible to have every part of an image in perfect focus. Because of this a photographer
chooses what will be in focus and what will not. Within Vray this will correspond to the focal distance. The
amount in which an object which out of focus depends on how far the are away from the focal distance of the
camera as well as the size of the camera’s aperture. A small aperture will have a only a slight amount of
blurriness for objects which are not within the focal distance. A large aperture will have a large amount of
blurriness for objects outside the focal distance.
Open V-Ray for Rhino's Render Options. Pull down Camera
control menu and will see the big item of Depth of Field
below. Default is set to off, check it if you want to have the
depth of Field in the final rendering. Depending on the way
your camera is set up you may want to check Override focal
distance. With out this setting enabled V-Ray will use the
focal distance of the camera.
How to find out the current setting of focus distance of the camera?
1. Open file Cups-Depth of Field.3dm, as menu on the right, in perspective
view, right click on Viewport Title and select Show Camera. See image below,
the narrow point in the scene is the lens of the camera, the point on the
opposite side is the Target.
2. Use Polyline tool to draw a straight line, open snap point mode, left click on the camera point
and move the mouse over to Target point. Look at the distance window below and that's the number
to use for the Override Focal Dist. In this case, 62.3724 is the number to use. Render it and you will
get the rendering with Depth of Field effect.
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V-Ray for Rhino