system
A chat on subreddit /r/pcmasterrace
human
Or a camera experience 

Example : Outlast 1 and 2
gpt
If it's a low quality camera it's a useful effect... But then there's games like Space Engineers that only has post processing on/off. A lot of post processing effects are quite nice but if you have it on, you always get string chromatic aberration because if the space suit helmet. Its just ugly as hell so I turn post processing off entirely...