I completed the game, and decided to finish up some quests. I needed a couple of bobbleheads and one was the Science bobblehead. The quest glitched - no cards. I used the console command to get the cards. Found the magazine, got he bobblehead. Once I used the card in the Overseers office, the quest started. But nothing worked correctly. None of the side quests checked off - explore the admin area, etc. Tried loading earlier saves and starting over. The quest never worked and the cards were never available from the gunner bodies. So I figured, "so what" - just finishing up some stuff, don't need the points. BUT - after that, the display is trashed. Pody pards on all my victims - and there are many - are all connected by lines and polygons. Buildings flash. Sunbeams look more like glass shards.

It's not my system - I've been playing with the max settings since day one. Hundreds of hours of play. CrossfireX, 6 core CPU, 64 gig of ram, SSD's.

As it is, the game is now unplayable. Even my companion is acting strange. Won't follow me out of rooms. When I fast travel, she's there waiting for me, sitting down, having a drink. Does not always participate in battles. Sometimes when she does, she's invisible.

I can go to earlier saves and it's fine - but the moment I enter vault 75 the game trashes.

Suggestions?

Thanks

From all this, a quick answer would be - corrupted save file?