Depending on the quality setting, seam sizes vary, sometimes having two things either overlapping or separating themselves visually, at random (ESPECIALLY when changing the camera zoom level). I hate this.
This is really, REALLY annoying when you're trying to capture the atmosphere of a level, then all these things act all finicky, unpredictably having these "seams" that make connections super hard to pull off professionally.
I hope this can be fixed...