HDRI backdrop reflect lower black hemisphere in UE5.5



I have checked in the HDRI backdrop, the skylight default lower hemisphere is unchecked
And the correct reflection only show up when i check the actor hidden in game box, of course it is not a desire result.
Is it a bug or any setting ii should check, because in UE5.3, it works very well by default.

Whats your reflection method? Are Screen Traces on? Hardware Raytracing with Hit Lighting?

Hi,

I’m having a similar issue with the HDRBackdrop in 5.5.1. I do have Lumen and Hit lighting for reflections enabled, as well as Screen Traces option on.
It’s been quite inconsistent within the same projects - it usually works in the beginning, but it stops working randomly later on. I can’t say that I’m doing something specific that makes it break, but it does.

Once thing I’ve done today is to change the mesh type from Dome to EnviroBox soft - the reflections came back when I did this, but then they went away when I re-opened the same project.

If anyone has any insight into this, it would be appreciated, as the randomness of it makes it hard to figure out what’s going on.