Using an Overlay material to create an outline:
- While simple to do, this has a big downside in that the result depends entirely on the type of mesh you use it with. Cubes or other shapes with sharp eges work extremely poorly with this.
- https://www.youtube.com/watch?v=33_PiRmOe_Q
Using a Post Process material for outlines:
- This works better for a larger variety of shapes, but is more complex to set up and adjust
- Basic setup: https://www.youtube.com/watch?v=INiUXnNlB1I
- Using different colors and transparency with the effect: https://www.youtube.com/watch?v=plMGQI5N1Co