If you're looking to set this up yourself, I can help you with: The needed on your SD card.
You cannot just dump images into the root of your SD card. SNES9xGX looks for art in a specific path. snes9xgx cover art
SNES9xGX is picky. It doesn't automatically download art for you (like modern PC emulators). You have to do the legwork. If you're looking to set this up yourself,
snes9xgx/artwork/ — For custom illustrations or fan art. How to Enable Cover Art in Settings SNES9xGX is picky
: Frequently shares curated "No-Intro" cover sets that are pre-sized and named to match standard ROM sets. Troubleshooting Common Issues
Search GitHub for “SNES cover art pack” or “SNES9xGX covers.” Many users have uploaded complete 1000+ image sets, already named for common ROM naming schemes (No-Intro or GoodSNES standards).