That is indeed very impressive.
I've joined your Patreon to support this work.
Has anyone tried reaching out to IGS to ask for info or original docs on PGM development?
I've reproduced the curl with both TimeHarvest (component video into the RetroTINK 5X) and HAS (SCART) superguns. I recently purchased a Shogun Ultra but I haven't had time to break it out yet.
I'm still doing some testing but I've managed to almost completely eliminate the curl with a...
I'm noticing the same screen curl issue as well with my HAS 4.1 a RetroTINK 5X (firmware 2.39).
Setting LPF to "strong" does not improve the image, for me.
I don't have Ketsui but I've reproduced this with several "Beat 'em Up" games and Demon Front.
The only thing I've found to improve the...