Images cropped and interface problems on non-16:9 screens

I'm pretty sure this bug isn't only for Onikakushi but I'm not sure where it would be better to report them. At very least, I'm reproducing them on Onikakushi here.

I'm comparing two systems, Linux running 2560x1600 (16:10) resolution and Windows running 2880x1920 (3:2) resolution. Latest steam version in both cases and latest releases of all the patches. I've installed all patches except for UI mod. I made screenshots on Linux PC here but the same problems exists on Windows system as well.

Problem 1: backgrounds are cropped in full-screen :( I expected black borders on top/bottom but the image is just cropped instead. UI is also cropped. I post here UI crop because screenshots are smaller but the same happens to any background
Window: 
Fullscreen: 

Problem 2: at very start, after the intro, there is vertical scroll of Hinamizawa. After that it's covered by black bars "cropping" the image. Well unfortunately they do that in wrong place and instead of crop you get ugly picture:

Now I installed UI mod. There are two problems, first is that buttons on the right are cropped and second is that "CLOSE" (and other text) doesn't fit the buttons. This happens both in window and fullscreen, though in fullscreen the interface is cropped even more due to problem 1. Window screenshots:

The issue describes rendering and UI scaling problems on non-16:9 aspect ratios. Look at the Unity project's UI canvas settings, camera viewport rect, and background image scaling logic. The UI mod likely has its own layout components. Test changes by running the game at different resolutions and checking the scene after the intro scroll.

Escrita pelo modelo de indexação a partir do texto da issue.