Post Processing
Post processing is super cool! as it’s not very hard to implement and makes your game look so cool.
DoF
Depth of field is effect in which when you look at an object, the objects around that central point get blurry.
It wasn’t hard to implement and I didn’t even need a tutorial for it (however I don’t know if this is actually how you do it).
All you do is get the depth information of your scene, render a blurred version of the scene (Gaussian blur), and pass it through a shader where each pixel’s depth is compared to the center pixel’s depth. Each pixel’s depth will get blurred depending on the difference between its depth and the center pixel’s depth.