This might have already been answered, but what exactly are power windows? It seems impossible to find the definition in this context on google.
Power windows are custom shapes drawn during the color grade to brighten or darken specifics areas a frame. They’re used for brightening faces, relighting scenes, focusing on specific areas of a frame, doing selective sharpening, etc. Every modern movie has thousands of them. And most modern restorations of old films have them too.
Some of us on this forum believe a pure restoration shouldn’t have power windows. Others see them as non-issues, because if an official theatrical restoration were released by Disney, it would certainly have them.
Just two different points of view, both worth discussing. I’m of the view that it’s good to have both — a proper preservation and a modern restoration.
Here is a great overview of power windows: https://youtu.be/pbvLZavPDvw
And if you’re interested in seeing power windows in practice on a real Oscar-winning film, feel free to check out this demo from Steven J. Scott. He graded The Revenant, Birdman, Gravity, Roma, Children of Men, as well as most of the highest profile Marvel Studios films including Avengers Endgame. This is him breaking down a few scenes from The Revenant. The demonstration begins at about 17:35. https://youtu.be/85lVPc0eAM0