It seems that decals have stopped working in orthographic projections. It doesn’t appear to necessarily be a camera problem, as the issue applies to both the game and the editor window.
More information at Do decals work with orthographic cameras? - Rendering - Epic Developer Community Forums
Hello Delzhand,
After testing this issue I have determined that this is a bug. I have entered a ticket and it will be reviewed by our development team.
The ticket number is UE-22780
Thank you very much for reporting this issue to us.
A bit of a hacky workaround I’ve found is to use a perspective camera with the Field of View set to its minimum value (5) and the camera distance set to a very high value. I’m using a springarm with a length of 17000. It’s a fair enough approximation of an ortho camera, but obviously it may not work for everyone.
Thank you for the update. I am currently monitoring the progress of the bug I have entered for this issue.