HDRI Background in UE

I wanted to combine my last two galaxy projects into one giant painted background since I needed to come up with something for an HDRI background and didn't want to start over from scratch. (Hurray for reusing assets!)
So I photoshopped and repainted a good chunk just to get the blending down a bit better.
It would probably still need to be finetuned into Substance painter if the character were to look directly upwards for seams, but since it's only being used as a backdrop and the focus is on a projectile effect that's where we're going with that.