Please, is it possible to render and save the Zbuffer as a bitmap?
I know, there’s a technique with one direct light and tuned mist, but I’d like some easier way 
Add an Empty in your scene, and make it track the camera with the X Axis.
Make a new material with:
Emit=1; Ref=Spec=0
A BlendTexture in the col channel (that blends from white to black)
In the MapInput dialog select Object and insert the Empty’s name
Apply that material to all the objects in your scene
In the ObjectButtons (where you have applyed the track constraint to the Empty), with the empty selected click on DrawExtra Bounds.
Now scale the Empty until its border contains every object in your scene
Hit F12
Hope this helps (it is simpler that it seems)
P:S: sorry for my bad english
Thanx a lot. I thought, there’s something less difficult, but your method is very good.
And you’re using a perfect internet english
Geezus, why not just save as iris?
What program do you use that can read the iris format?
showzbuf.so
http://www-users.cs.umn.edu/~mein/blender/plugins/sequence.html
Look for the Showzbuf sequence plugin. You’ll need to know how to use the sequencer though.
Thanx for replies. I’d like to try the DOF filter in HCR Edit while our Zblur plugin doesn’t work in Blender 2.32.