Just so that you know that picture is unaltered in any way, those green rings are the blade tip electroluminescent formation lights.
Thanks for the added info, the pic is gorgeous.
Can you point me to the original photo?
BTW, there was an Air Force Osprey at Rockford Airfest last weekend, and those engines leak a ton of oil, or at least they do if they’re locked about 20 degrees forward of vertical.