There are two different strategies:
A) installing an old graphics card shown in the SNAP compatibility list. On my old computer (2005) I ran an ATI X300 with Snap and a 1920x1200 pixels DVI 26 inch monitor.
The main problem of this strategy is that current operationg systems do not support this old hardware. On Ubuntu, version 10 was the last with ATI X300 support.
B) installing a real current graphics card or an APU processor. Because of the lack of SNAP support, you need a fast graphics card to get speed in VESA mode. A current Ryzen G APU processor (90 EUR) comes with a fast (comparible to graphics cards mid-class) graphic and I managed to run 1920x1200 pixels (all has been installed automatically by ArcaOS). I assume that 2560x1440 pixel will work, too. This resolution seems to be a limit: Higher resolutions are no more supported with DVI cable, you need a HDMI cable instead. And perhaps there are other limitations, too. I can set an old Windows game up to this resolution. And there's a non-technical problem: If you use 4k resultions, the OS/2 VIO fonts are going very small.
My new computer is faster with Panorama than the old one with Snap and ATI X300 card and needs less energy. I also tried the same mainboard with the elder Bristol Ridge processor (predecessor processor generation of Ryzen), and there's a distinctable difference. So "brute force" is an adequate strategie with Panorama...
I have heard that meanwhile ArcaNoae has got the rights for the source code for SNAP. It is planned to support current Intel and AMD graphics in the future, but no timetable.
The next days, I will publish here in the forum a detailed report with my new AMD Ryzen G computer where I have installed ArcaOS, Windows 10 and a current Ubutnu Linux, which was a hard work but now works - nearly - fine, but at the moment only 1 processor used (modern hardware, safe mode). And Seamless Win16 does not work, that seems to be a Panorama problem.