Sphere reflection Influence radius


I’ve been dissecting the Robo Recall maps to see how they were made and how best to create environments in VR.

I’ve noticed in the hub scene that Epic use Box reflection actors to capture the main reflections in the scene and then they seem to use sphere reflections in certain spots to give the metals a highlight with zero influence radius and a 1.5 brightness.

I can even see the environment being affected by the sphere reflection actors in the reflections view mode even though they have zero influence.

Now I’ve tried this in my own scene and cannot replicate the same thing with a influence radius of zero.

Is there something that Epic is doing under the hood in the code to do this?

Any help will be appreciated.