yuo can do it with arnold and eevee( see attached), so I a guessing it's not that hard to implement. I can't make it work properly with light path node, comes out a bit weird looking, though it does kind of work With Cycles lights you can add nodes and do some quite creative stuff. There is a workaround so you can turn off…
It depends on the microdetail frequency of the height/disp map, but generally you don't need the normal map if you have a high detail disp map and use disp+bump. Renderers like Arnold/Vray/Corona have added this displacement bump feature to cut down on geometry density. Arnold displacement, for instance, works like magic…
@Deforges Well, I firmly believe 2.80 deserves plenty of tribulations. It is a fantastic piece of software(obviously free) and the devs are doing a great job in transforming it into a serious option in the industry(not sure what point you're making about Max Proboolean, though?) The baked results are all I'm interested in.…