When you OoB in this game you tend to encounter one of the following

  • a fall to your death
  • a fall into a big plane of Water under the level
  • an Upwarp
  • (anything else?)

See backlinks for examples of OoBs

limbus was able to get an OoB on this geometry at the end of Sailor Jigsaw, on the seam between the door and the wall. but they weren’t recording and no one has gotten it since (discussion, which has some description on how they got it). If there are other instances of that geometry, it probably works there too