I noticed that when adding new materials (like brick, for ex) after adding an AO channel, they will no longer import their proper, specific AO maps... they are just blank gray overlays. In 1.8 as I recall, all of the megascan materials had their own unique AO maps that would multiply on top of your base AO. This also applies to the dynamask editor: the AO channel is just blank.
Also speaking of AO, there is also no longer your base AO map in the stack at all, so you can't manipulate that either... makes working on AO maps in general quite difficult and time consuming.
Note that it does properly import the AO map with custom made materials, just not any of the stock megascans.
Also speaking of AO, there is also no longer your base AO map in the stack at all, so you can't manipulate that either... makes working on AO maps in general quite difficult and time consuming.
Note that it does properly import the AO map with custom made materials, just not any of the stock megascans.