So honestly I haven’t even gotten far enough to use or test lightmass in my level. However I have always been a big Vray fan. Can the new Vray integration be used in place of lightmass for baking in light to materials?
No, currently what they’re doing with Vray is just allowing you to render an image using Vray (so it’s easier to do everything in UE4 rather than having to use Max and UE4)
But–in the future they could use Vray to build lighting instead of lightmass.
Also, the new Datasmith plugin can convert Vray materials when exporting to UE4, which will help a lot.