/vr/ - Retro Games

>>374186
RetroArch has custom resolution and refresh rate options to do that with. But the native resolution can change on a per game basis.

In SNES's case, it was generally 256 or 512 wide and 224 or 240 high. So I go with 2x integer scale to 512x480 for pseudo-hi-res compatiblity and slightly more blocky pixels.
With a filter for gamma to correct colors, and a filter for hi-res blending that only runs when there's hi-res being output (so as to keep everything else from blurring unnecessarily).