I’m using “PSA Velocity” parameter to make particles face direction they move, but somehow it makes particles size to be dependent on their speed, it also causes them to frequently randomly change size, about two times a second; i’m not using “Size By Speed” module.
Such appears only when using “PSA Velocity” and only in Level Viewer, emitter works normally in Cascade Editor.
I’m new to UE4, so I’m not sure if it’s me but bug.
If your velocity is lower than a value of ~15 there are some artifacts with velocity alignment. Sorry for the inconvenience I have not found a way to fix this personally, I believe it is just a limitation of Cascade.