Please make it VERY simple to light your scene with a HDI or IBL!
I know that this is possible currently, but it really isn’t all that straight forward. Especially for an artist that wants to use the engine to display portfolio work and use UE4 instead of something like Marmoset Toolbag.
Currently it seems rather difficult to match the look and quality from Marmoset Toolbag with an IBl set up.
Also please make it very easy to use a resolution other than 512 X 512 for your IBL.
(Please forgive my ignorance if this is something that is already being worked on.)
Like blending different HDRI to make really smooth day/night transitions that aren’t procedural. EPIC definitely needs to work on a GI solution, because they still don’t have anything to match Cryengine or Unity when it comes to lighting large open areas. Not that I like those engines, but that is the one thing they are definitely better at than Unreal.