Where is StdLib.hlsl ?

Questions & Answers
1

I want to achieve a similar look to Manifold Garden
172338-capture.png

And for that I found this little shader on the internet : UnityOutlineShader/Assets/Outline.shader at master · IronWarrior/UnityOutlineShader · GitHub
but it uses some StdLib.hlsl file that is nowhere to be found…

2

Found it : had to install the post processing package