Documentation is
HEREStandard RP Sprite Support
URP Sprite Support (new 2d light system and 2d renderer data)
LWRP Post Effect Support (sprite will NOT be supported for LWRP)
Masking (to give any shape to effect with alpha masks) only supported for URP!
Full package also including this shader is HERE:
Standard ShadersFull screen image effects and sprite support for your 2d games.
You can add mist, fog, storm, sand-storm, smoke, snow, rain effects to your 2d games very easily.
Just play with color, size, speed (direction) or density (etc) values to create your effects.
Models which are used in videos or screenshots ARE NOT INCLUDED in package!