Simple ParticleSystem shader unlit

Hello there,

I just want to use a simple shader to my 2D ParticleSystem. (unlit effect for my particles)
The default shader blends particles images and the color is too white.


image
I tried to create a custom Material but the material works only once.


When I reload the scene i got the same effect.
image

Try merging this pr.

Indeed, i tested with CocosCreator 3.7 beta and the material is OK.

Thanks.