Some rendering glitch randomly appeared on multiple levels. It seems as if there is a render plane that is clipping with the world. What setting can change this, and how can this effect be prevented? Any fix would be greatly appreciated.
Update: The problem encountered was solved by increasing the min screen radius for cascaded shadow maps in the project settings to a much larger value. It seems the value reset itself to its minimum somehow, thus breaking the shadows.
Edit: It appears as if the near clipping plane being set too low in the project settings also causes this effect.