On UE 14.3 everything works fine (Top Down Shooter blueprint project):
Now on UE 15 (Top Down Shooter blueprint project):
Notice the weak glow and broken color even tho both pictures use the same settings.
This was my first UE 15 project so I do not recall having touched anything that would cause this. I tried to tweak the material settings and post process effects to find a fix/work around but with no aval.