This the source code for a tutorial on how to implement a side-by-side stere camera setup in Unity 2018
You can find the tutorial here:
https://sigitov.de/how-to-implement-a-side-by-side-stereo-camera-setup-in-unity/
JunmingZhang/SideBySideCamera
An example of the Side-by-Side stereo camera setup in Unity Engine
C#MIT