Applying shader to a sprite leads to strange things

In my game I have multiple sprites and I want to apply my shader to them. I do things by this sequence: Create Shader -> Create Material -> Add the shader to the Material -> Add the material to my sprite(s). But when I add my shader to the material, images get started looking like below. What I do wrong and which way is right?

P.S.
I create Unlit shader and do not change nothing inside it.


Before applying shader.


After applying shader.

 

If you don't clip by alpha (alpha test) - you will take result like on screenshots
i.e. you have alpha = 0 (or near 0) in specific positions, to get smooth contours on rounded square
p.s. approach with alpha test is not universal due to artifacts on threshhold, probably your shader already has alpha test, and you have this artifacts

you can use alpha-blended shader to properly blend any alpha value with background

as a base you can use "UI/Default"
https://github.com/TwoTailsGames/Un...er/DefaultResourcesExtra/UI/UI-Default.shader
or "UI/Unlit/Transparent"
https://github.com/TwoTailsGames/Un...ResourcesExtra/UI/UI-Unlit-Transparent.shader

the core blending option is
Blend SrcAlpha OneMinusSrcAlpha