Forgive this being slightly off topic, but you might also enjoy these posts of a similar flavour, on the game Deus Ex: Human Revolution.
I particular enjoyed the Silhouette Effect section in the first of the two.
https://www.adriancourreges.com/blog/2015/03/10/deus-ex-huma...
https://lousodrome.net/blog/light/2015/05/18/reverse-enginee...