A new SRP from scratch
Unity version : 2019.3 on master branch
There is also 2019.1 and 2019.2 branch if you need
Tested with : Win DX11, Mac Metal
References:
My messy custom SRP study for Unity2018.3
SRPFromScratch by pbbastian
Siggraph 2018 SRP presentation by Matt Dean
Custom Pipeline by Catlike Coding
LWRP & HDRP