I have heard of this trick using edge lender nodes and subtract nodes to achieve a "halo" effect on an object. I am unsure if I had misunderstood the reference or not, but this sounds exactly like an effect I have been trying to achieve for some time. I have been scouring tutorials and shader discusion threads for the exact reference of this trick for some time, and I have also been experimenting trying to replicate what's discussed - but no luck on either point. I am not sure if I am doing something wrong, or I just misunderstood the effect it produced. If anyone has a link to where this trick is described, or a tutorial with it, or knows of it and can explain how to connect the nodes properly I would be very appreciative.

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