The Day of the Triffids
First things first - I must give credits to Dylan Cole, one of my favourite matte painters, because I used his matte of apocalyptic London as my background.
Now, I'm not usually a person to go to for book recommendations BUT I'll make an exception this time - if you haven't read The Day of the Triffids, put it on your list. Apocalyptic world full of blind people and agressive plants taking over the planet, that's a definition of shit hitting the fan. Here's my take on what the terrifying Triffid could have looked like.