The texture is breaking down

Good afternoon, I have this problem with textures. Sometimes also breaks snow (instead of snowflakes fall signs ???). Helps only to restart the game. Mods, of course, are present, as well as custom content. Pull them out and check the method 50\50 I can not, because, as I said, to restart the game helps to get rid of it. I don't have the floor textures and other things replaced. In general, the floor itself is not custom content, but in-game. Maybe who has encountered this, what custom content can break like this?