Ha ha! Solved it!
I went with this approach....
http://studiof504.blogspot.com/2010/03/mayas-luminance-depth-preset.html
Where you disconntect the old min and old max attributes and then changes...

Hi Laurie,

Can you tell me more about multiplying the z depth to a visible range please?
I have my luminance depth all set up and it renders perfectly in a standard single frame render, but when...