Currently the Archviz “Queen” is Lumion…is so easy to use that is almost embarrassing and righfully so, because it does what it does and the results are very very nice…you also have a viewer which can be sent to the customer and he’ll be able to check everything by themself which is a pretty good solution.
No VR for now but I think they’ll add this feature in the near future.
UE4 have stunning features and can be adapted to do anything, but if far from being a 100% bullet proof solution for ArchViz, mainly because of the time it takes for the lighting, which is the critical point 99% of the time.
There are realtime solutions for GI but far away from being usable on a daily base and especially to show to the customer most of the time, and of course it takes a beast of a rig to run something like that…
I wonder if with Enlighten the realtime GI is something which is well implemented or is something which is still in early stages…