Put the summary of the bug you're having here

What I expected to happen was...:
the game to be playable

What actually happened was...:
textures were flickering, mobs were phasing in and out of existence, graphics were all messed up, etc. (i tried reinstalling the game btw)

Steps to Reproduce:
1. I don't know, I just installed the game and it was already like that
2. ...
3. ...