> (For AE) Make sure you render your scene to the RLA format and that the Z Depth attribute in the render globals is set to on. After Effects will not read the Z off an IFF file (Shake will).
> in AE apply create a comp with your RLA sequence and apply the Effect > 3D Channel > 3D Channel Extract. Choose Z-Depth. You are going to have to change the extravagant values on the black and white point until you see the zchannel appear in the comp window. See below
> Now create another comp with your footage on the top layer and the comp where you extracted the z depth at the bottom (and turn off its visibility). Apply a Effect > Blur > Compound Blur to the top layer:
> You will see how the background objects are blured and the foreground objects are not. This is an approximation of a depth of field effect. For more exact effects it is recommended to use Shake’s ZDefocus node or AE plug ins such as Lenscare.
> Download the After Effect Project and related files here .