Using depth of field in a 2D project

Hi, i'd like to know how to use depth of field in a 2D project (platformer).
I would like to have a nice blur like in Hollow knight in the foreground and background.

I tried to use the post processing stack (https://assetstore.unity.com/packages/essentials/post-processing-stack-83912) but it seems that it only blur everything, not in separate layers with various strength.

 

I think it's in their sprite. They drew the background to blur. You can easily do tht in photoshop. Also they use parallax effect to achieve it.

 

If you want true depth of field then you need to use depth. Separate your layers in the Z axis.

 

Thanks for replying.
So the post-process depth does not work on sprite, so the only easy posibility is to do it on photoshop.

 

It can work with sprites, the default sprite shader has ZWrite off. You can either duplicate and edit the shader to enable ZWrite and put it in the opaque render queue, or find a shader online that supports it.

ie:
https://github.com/traggett/UnitySpriteShaders

 

Hi, could you please take a look at my post?
Is this blue fog or light made by shader?
I have no idea to implement this effect, should I write shader code?