I took photos at a wedding reception. The event took place in a room where two adjacent walls were interior walls with no windows, and the other two walls faced the exterior of the building and let in a lot of natural light through large windows. The chandeliers in the facility put out a heavy yellow cast. The walls are a curious color to begin with, almost a pewter color, sort of a greenish gray with a slight tan tint in it. In some shots, the wall goes from light tan to dark grey. This is insane. What can we do with environments like this? To the human eye, this place has grey walls 24/7. In photos, the walls look absurd. It's bad enough removing the yellow cast from whatever strange bulbs they used in their ceiling fixtures, but what can I do about the walls in the shots where it looks like some kind of circus paint job, spanning a gradient from light tan to dark gunmetal gray along the same vast expanse of background?