The BCC Z-Blur filter uses a Z-map image to emulate a rack focus effect.
Move the focal plane through the source image, using the Z-map to control the
focus. Adjust the focal point, depth of field and blur parameters to finetune
the area of the image to blur.
You can also set a channel from the image clip, then use that channel to
control the z-blur effect. This type of effect is most noticeable in real life
with a long focal lens, such as a 105mm or greater zoom lens.
The built in PixelChooser, with integrated mocha planar tracking allows for
greater control over which areas of the image the filter should affect.
[To learn more about this filter, and see a breakdown of the various controls,
please click here.](https://www.borisfx.com/helpdocs/?page_id=1438 “BCC Z-Blur
Help Documentation” )