Help i loaded up new vegas hoping to have a fun play through disregarding the issues i have had in the past with characters falling throught the map and things dissapering so i pit it away for a year now witH the anouncement of fallout 4 i desided to give it a try again all tables have been turned to red triangles with a ! in the center some other things that have missing textures are most floor tiles sunset sasperilla machienes and bullets in vats oh and paintings that hang from the wall

Make sure your game is fully patched.
It could be caused by save file corruption, although a corrupt save usually won't even load.

Other than that, try clearing the cache on your Xbox.