[Feature request] Add option to maintain 4:3 horizontal FoV for widescreen and scale black bars according aspect ratio during cutscenes

[UncookedMoa]

When playing in widescreen, more parts of the image are visible that were previously not meant to be seen, and it is a known issue that removing the black bars shows broken parts of the cutscene developers did not want players to see, as the cutscenes were originally made for 4:3, using black bars to create an approx. 16:9 frame.

The black bars during the cutscenes are meant to create a cinematic feel by creating the illusion of a wider aspect ratio (which is approx. 16:9) on 4:3. This gives the illusion of playing back a video clip that was made for a different aspect ratio. As such, it would make sense to treat the cutscenes as though they were video files playing back through a media player. This could be achieved by maintaining the original game's widescreen FoV during the cutscenes. In the interest of preserving the visible area from the original game in widescreen, I would propose preserving the original 4:3 FoV during cutscenes in order to ensure that absolutely nothing that wasn't visible in the original game is visible in the cutscene when playing on widescreen. With this option, black bars would also scale according to aspect ratio.

For example, if 4:3 cutscenes are like this:

Then 16:9 should preserve that horizontal viewing area, treating the 4:3 cutscene like a video player hypothetically would, with the visible area being the same as 4:3:

21:9 would then pillarbox to 16:9 during cutscenes in order to continue preserving that video clip illusion when this option is chosen. The black bars could change according to the screen's aspect ratio.