Hi Michael,
Did you find a better way of applying your highlight effect without modifying every material you had? I’m stumbling on the same issue. I wished I could “sample” an existing material from another material. This way I could make a “super” material that I apply dynamically to the selected object, put the old material as an input of the super material (programmatically), and blend it with another set of effect. But that doesn’t seem doable.
Thanks,
Joel