These are the 3-D box art images that I use for retroarch.
They are not complete sets, but the images I could find for the roms that I have.
They are all Compressed with Pngyu to save disk space.
I did not create these, I just found them.
If you see any mistakes, or want to add, please submit a pull request.
Credits:
Atari 2600 - WallyWonka (EmuMovies)
Atari 5200 - DamnedRegistrations (EmuMovies)
Atari 7800 - DamnedRegistrations (EmuMovies)
Atari Lynx - Koolbrez67 (EmuMovies)
NEC PC Engine - Kondorito (EmuMovies)
Nintendo 64 - Kondorito (EmuMovies)
Nintendo DS - Robin55 (EmuMovies)
Nintendo Game Boy - WallyWonka (EmuMovies)
Nintendo Game Boy Advance - EmuMovies Community (EmuMovies)
Nintendo Game Boy Color - mildanti (EmuMovies)
Nintendo NES - Kondorito (EmuMovies)
Nintendo SNES - Stephelus (EmuMovies) and Rubbishmonkey (Reddit)
Nintendo Virtual Boy - EmuMovies Community (EmuMovies)
Sega 32X - Robin55 (EmuMovies)
Sega CD - Robin55 (EmuMovies)
Sega - Dreamcast - SupraKarma (EmuMovies)
Sega Game Gear - WallyWonka (EmuMovies)
Sega Genesis - DamnedRegistrations (EmuMovies)
Sega Master System - Jardavius (EmuMovies)
Sega SG-1000 - Dreygor (EmuMovies)
Sony - Playstation - WallyWonka (EmuMovies)