Hey I’ve been trying to figure out what a 2D SDF are used for and how they work for unity shader graph?? And any information is helpful please and thanks.I’m practicing styalized Vfx so preferably info for that of it make any difference 
This is probably what you are looking for: What Are SDFs Anyway? — Joyrok there is also part 2.
And this is super useful even though it is for unreal, but it should cover a lot of what you need: https://youtu.be/o90xi9xSGfA?si=oal6gEBjvxByYJad
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