Made some changes to the tool! Improved some options and simplified the workflow, hidding or automating some other features which I think usually didn’t tweaked by anybody. So have send it to be updated into the marketplace and it should become updated during next week.
Another comparison between the Unreal Engine default’s backdrop and my Adv HDRi background tool:
As always, UE Backdrops seems to not allow a full Global Illumination, and leaks Ambient Occlussion too.
Best regards!