A great effect to add for in-game TV systems is grainy (visual noise) grayscale Post-Processing. This adds the feel of cheap, old-style CCTV systems, such as might be used for a security system, and to add some kind of menacing film noir effect:
To add a vignette effect, do the following:
- Open the Asset Store panel, then download and import the free Post-Processing Stack assets published by Unity Technologies.
- In the Project panel, create a new Post-Processing Profile file by going to Create | Post-Processing Profile. Name this new profile film-noir.
- In the Hierarchy, select ...