Pixelated dissolve effect help.

Hi Everyone,

I hope this post is in the correct place, if not please shout and I will change it to the appropriate place.

I’m fairly new to UE and looking to create a effect like a dissolve but a pixelated style.
I have some particle strips that are to look like wind that fade off over alpha, I was wondering how to approach it so rather then a slow fade the particle has a dithering at the end, so it looks pixelated.

Any ideas would be much appreciated.

Thanks in advanced