How to Get this effect

How to get this effect? (Game Hollow knight)


Twinkle bright points that filled all the screen,in some where I notice there is another layer that with the same effect cause their depth are different.
How to make it?Particles? 2d - material?

 

Without seeing moving image i’d bet they are just simple particles.

 

Here is the moving image, not very distinct ,file size limited...

 

Looks like particles with some very slight noise added to their movement.

You could just create box/plane shaped volume that covers the screen and spawn particles inside that. Then spawn particles with quite long lifetime. Fade them in, then fade them out when they die. And add a mild floating effect by modulating the position with noise.

 

Oh,I will try it , thanks very much.By the way,is there some course that for Unity effect creation?