Blue semi‑circle tint at bottom of image

I’m running into a strange rendering issue in Unreal Engine 5 (Movie Render Queue) and would love some ideas:

  • I’m rendering orthographic/isometric stills from a CameraActor via Level Sequence + Movie Render Queue.

  • In every render, the bottom part of the image is tinted by a blue semi‑circle / half‑disc.

  • This shape does not move when I move my scene objects or the landscape, and it’s not visible in:

    • normal editor viewport

    • Game View (G)

    • PIE preview

  • It only shows up in the final MRQ output (PNG/JPG).

Any help appreciated!