How to make depth blur in unity3d?

Question

Unity

How to make camera focus with distance change and background blur power. Maybe there are free shaders?

Answer 1

https://docs.unity3d.com/Manual/PostProcessing-Dep...
read the documentation.
really, keep in mind right away that the effect is "expensive" in terms of performance) otherwise you never know what you want to insert into an overloaded game on mobile phones, thinking that it's almost for nothing)