I just built my level again after moving some blocks around and this weird fisheye lens has appeared over my editor camera.
It goes away while I play my level though then returns as soon as I stop playing.
I don’t think I touched anything to do with the camera.
Anyone seen this before?
Anyone know how to fix it?
Thanks in advance 
Standard answer, for posterity, is the FOV setting for the editor viewport was likely changed to something closer to 200:
-Check FOV settings in the “Viewport Options” dropdown in the upper left corner of the viewport. 90 is a good default. 170 or thereabouts is fisheye territory.
-If that doesnt work, try resetting the editor layout via Window → Layout
In my case, the problem was a Cuphead branded Xbox controller I left plugged in from testing the day before. While plugged in controllers are famous for causing your camera to spin or mouse to move, this was this first time I’d seen it move a setting in a menu… 