I recently experiencing a problem that I never had. In the viewport of Cascade, the particle effect always appears in Unlit display. Even if I set the display Lit, it seems to not see properly the particle effect. I put the images to make you understand better.
I do not know if the eye deceives me but, the Lit and Unlit display seem pretty much the same to me. The thing that you notice is the absence of the halo around the bright color. Instead in the sample particle system, P-Fire, the bright halo appears. Where is the problem?
You see the same in the main viewport of UE4.
Thank you and I apologize for my English