How to hide an Ugly Vent?



Any ideas as to make it less ugly, as I know I can't cover it.
Every room in the house is pretty much painted and decorated except this one, and it is the main room!

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You can find pretty vent covers online. That may help.
Ah that’s harsh for sure! What were they thinking indeed! As this is a return vent, you could assemble something artful out of wood and paint it to match your walls.