Hi, I just noticed I have this problem in my UE4 level, my perspective viewport is rotated! :O I don't understand why. My meshes are perfectly aligned in the orthographic views, but not in perspective. Anybody got an idea for this problem?
some key allows you to roll the camera, i think it was alt+rmb in older Editors, i don't know in UE4, try enter the following text: BUGITGO 0 0 0 0 0 0 into the text field on the upper right corner of the editor window, which says "Enter console command" it will reset your camera transformations, maybe it helps