OK, question for the collective here... I had a thought this morning...
Soooo, I currently have SU Re-Imagined set up at 1920 x 1080 (16:9) as the default size.
A lot of the SU Unity backgrounds are sourced from 1024 x 512 (2:1) backgrounds, upscaled to 2160 x 1080.
Ren'Py rescales the window 'on the fly' in windowed mode, so other than download sizes the size of the background image isn't all that critical, although if you end up with 'excess pixels' in one dimension as the other dimension fills the window size, you'll end up with black bars either at the top or bottom, or along the sides.
The one downside of a 16:9 resolution in this instance is that it crops off the edges of the various backgrounds used if they are cropped to 16:9, but then you can't appreciate the work put into the entire background.
Adjusting the 'ingame' stuff that's made so far to take advantage of a 2:1 ratio would take me a little time, and flipping the Ren'Py 'defualt' size over to 2160 x 1080 is easy peasy (took me about 30 seconds), although I need to re-save a few backgrounds and such without the 'crop' and extend a few things, which also wouldn't take that long...
Here's a couple of quick comparisons of the backgrounds shown at 1920 vs 2160 width...
FYI, the 2:1 is actually a thing that you see used in some movies, it has a name (Univisium, Univision was already copyrighted by some network hence the slightly weirder name, I've never heard this term before btw.)
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But the main thing here is that a number of the SU Unity backgrounds are set up at 2:1. The wider examples above do have a bit more of a 'movie' feel I suppose...
An extra 240 pixels for the management and profile screens would be nice, but if I were to make that change, yeah it's not easy to change back... well I suppose I could 'cut and paste' the current code and screen backgrounds from the current install in the future, but if I add anything new...
Note that if you have a 16:9 ratio on your monitor, and like to play your Ren'Py games at full screen (I play in Windowed mode pretty much all the time when I can so that I can multitask), you'll end up with thin black bars at the top and bottom if I set the 'default' width to 2160. Not a big deal, but it'll be a thing...
Back to my question though. What are y'all's thoughts r.e. using 16:9 vs 2:1?