Whether you’re a fan of CGI in movies, prefer the practical effects, or simply don’t give a crap about computer generated imagery in cinema one thing’s for certain- you probably don’t know the difference between good and bad CG visual effects.
That’s not to say it takes a trained eye to spot bad CGI, but almost every single movie has some sort of computer generated visual effect applied to it nowadays so it’s hard to tell a good use of digital enhancement from utter rubbish.
This visual essay by Freddie Wong for RocketJump Film School does a really good job of illustrating the difference between good and bad CG VFX, and once you watch the video you'll start spotting all those CG effects you weren't supposed to notice.
-Via Laughing Squid