That sounds super complicated.

Is there a way to tweak OpenGL so that it stretches correctly?

In your 720x400 mode, did you try reducing the horizontal blanking? That might be enough to scale the 640 active pixels to your screen width. You mean using the monitor's resize feature? Sure, I could adjust the width of the displayed image, but then it would mess with every other software that use...

You can however use the OpenGL mode if you want to be able to select a lower fullscreen resolution and then use Ctrl-Alt and + or - to cycle through the available resolutions and finds the one that suits you best. I just tried it. While the main menu now fills the screen properly, the games are sti...

It really is 320 pixels. Don't trust the 720, the monitor simply doesn't know any better. This mismatch may cause aliasing, but probably isn't noticeable due to the really low resolution, hence can be ignored. I don't know what my graphics card and/or monitor do exactly, but I can't see any sign of...

This was taken by booting with a DOS floppy disk and running the game natively. https://i.imgur.com/sXHTXDkl.jpg This is SCUMMVM 2.0.0 on Windows, with the resolution artificially set at 720x400 (SCUMMVM only changes its internal rendering resolution, not the display resolution; it keeps the Windows...

I have a modern gaming PC, and a CRT. I can change to whatever resolution is needed. How do I configure SCUMmVM so that it displays fullscreen at 400p natively? (with the correct aspect ratio.) I messed with the options a bit but it seems that SCUMMVM doesn't change the display resolution, it sticks...