V-Ray for Rhino Manual - Rum

And also, hit the Tab key when the cursor is locked to the Target point, and then move the mouse. You will
find the direction from camera to Target point is locked. Move the cursor and the number for distance below
will change accordingly. Move the cursor to desire focus location and memorize the number below. Use this
number for the Override Focal Dist. and become the new focus distance. Hit the Tab key again to unlock the
direction.
Image on the left is rendered without Depth of Field and image on the right is rendered with it's Aperture set
to 1.0 The Depth of Field has already apparent in the image and the focus point is at the green cup.
Size of Aperture
There is Aperture located at the top of the control panel for Depth of Field under Camera. V-Ray doesn't use
the same number unit of F1.4 F2.0 F11 as normal camera does to control the amount of light comes into the
camera but use the system unit for its size. Smaller number has less effect on Depth of Field. Larger number
will make the object very blurry and takes longer time to render. Especially when calculating the edge of
object for Depth of Field effect. So we recommend you start with smaller number and move your way up if
you need stronger effect
Change Focal Distance
Go back to Camera's control panel, keep the Aperture as 1.0, then input 47 for the Override Focal Dist. and
make it closer to the red cup's opening edge. Render it and will get the image on the left, Green and red cups
become blurry. Image on the right is rendered with Override Focal Dist, changed to 72, approximately at the
front edge of the red cup. So now the yellow and green cups become blurry.
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