The workaround would be to use a shader with Translucence, such as uberSurface.
Thanks Richard! The Mystical Touch staffs are the solution then- They have UberSurface shader effects that I can study and duplicate for my own props. And WOW- there’s 50ish sliders/settings/maps to learn for UberSurface- lots of control there, very good.
I sent you an email, but the gist of it is…the negative scaling was ‘incorrect’ behavior…the current way is ‘correct’. It was switched to fix a different bug…one that had much more of an impact and was very commonly encountered (black surfaces showing up in normal renders).