[Noita ultrawide mod]

I've got the mod working as intended, but I'm trying to customize it, and I'm having trouble. I've spent the past 6 hours trying to reverse engineer this, and determine what these values actually do, and after everything, it's still not making sense to me.
The questions I'm trying to figure out:

What settings control the size of the game window?
What settings control the scale of the game?
What settings control the scale of the UI?

What's going on with the shaders file? Why do those values need to be altered, and what is their relationship to the game resolution?

Here's my work on the process:
https://docs.google.com/document/d/1BfVQkNKPckonjmzTmP1n4yRu0havLBCiAYUIY-2iBB4/edit?usp=sharing

If @Rose can chime in, and share their experience, I would greatly appreciate it.

[Noita ultrawide mod]

Can you add some documentation as to what configurations the mod makes, so people can customize it?
I've got a multi-monitor setup, and I am trying to see if I can get Noita to span across 3 screens (10720x1440, windowed).

That would sort of be amazing.