Nuke – ZDefocus Edge Errors

Has anyone had this problem with the ZDefocus Node?

I get very weird artefacts when I defocus a monitor graphic that I’m tracking into a shot.  It looks fine straight out of the ZDefocus node but when I gamma up to 10 I can see artefacts around my element.

I’ve uploaded the script to dropbox.

Any thoughts would be greatly appreciated!

My conversation on The Foundry Nuke forum.



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