Hi, i am the author of that UDK bathroom demo.
and i can confirm, realtime reflections like that are impossible to achieve in UE4 without the missing SceneCaptureReflectActor.
Which is really mind boggling to me. Why on earth would you discard a feature as essential as that?
Is there a way of getting this request to the right ears? cause i would love to see the SceneCaptureReflectActor implemented ASAP
This is how realtime planar reflections worked :
v=2XoheOgAfkg
and i cant think of any good reason why this should be impossible to do in UE4.