Changing the surface thickness of many selected surfaces at once does not work…consistently. Damn, I was going to say it doesn’t work at all, but re-testing it and it just isn’t consistent. Haven’t figured out why yet but thought you should know.
When I figure out a consistent way to make this happen I’ll let you know. At this stage it does happen, but I haven’t figured out how to do so consistently. It might be something to do with the selection having different settings/values throughout, as opposed to selecting a set of fresh surfaces with no thickness settings.