My character got this weird embers effect around him. Tried all the suggestions listed earlier, as with all Bethesda games, nothing worked just as I expected. Reverting to an older savegame was the only choice. It probably was some obscure mod that thought adding that screen effect was a great idea. edit: looks like it was toxicity that was causing it reactivating the mod and disabling the particle effect got rid of the flying ashes, phew!