Looks like the textures aren't fully loaded in yet. Are you playing off of an HDD?
Viewing post in texture problem in game
If you look in Task Manager, and go to Performance, if you went to your drive, it should tell you the type. Either HDD or SSD. If it's HDD, I'd recommend trying to put the game on an SSD, and see if that fixes your issue.
On another note, if your HDD is actually slow enough to not be able to load in textures, I would be pretty concerned.