VISITS:
Tutorial by Knut Uppstad
Z_Depth in Photoshop and After Effects
How to do it in six easy steps
Z_depth gives you control over your DOF, depth of field. You can select where to put your focus and how blurred the image will be.
Z_DEPTH IN PHOTOSHOP
1. Open your saved files in Photoshop.
2. Choose Channels. Click create new channel.
3. Select your z_depth file.
Choose Select All and File/Copy or Ctrl A and Ctrl C
4. Mark Alpha1 channel.
Choose File/Paste or Ctrl V
5. Click RGB and uncheck the Alpha1 channel
6. Select the Filter/Blur/LensBlur
Click image to enlarge
Check that Depth Map source is set to Alpha 1
Tweak the Blur Focal Distanse and set the focal point
Iris set to Hexagon (recommended)
and tweak the Radius to set the blur amount.
SEE HOW TO USE Z_DEPTH IN AFTER EFFECTS
Hope you found this useful.
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Read more: http://en.wikipedia.org/wiki/Z-buffering