How to change the clear color of the Unreal camera before each frame is rendered AR

Is it possible to change the clear color of the Unreal camera before each frame is rendered? I am having some issues creating a Hololens app and when the holograms get composited over the camera feed (in the video recording), there are lots of aliasing issues as well as blending artifacts. Microsoft recommends to clear to transparent black and it seems like that might fix the issue but I am not sure how to change that in Unreal. (Mixed reality capture overview - Mixed Reality | Microsoft Docs)

Did you ever manage to fix this, by any chance? When recording a UE5 application on a Hololens 2 I’m getting a black background in all “transparent” areas, and I think this may be the same issue.