Background artwork for the MAME games Asteroids Deluxe (astdelux.zip) and Space Invaders (invaders.zip).
The backgrounds are made for the RetroArch core "Arcade (MAME - Current)", which is the latest version of MAME.
Older RetroArch cores are NOT supported!
Place the files inside the artwork folder:
Do not change the name of the files and don't unpack them, otherwise MAME will not recognize the files correctly!
MAME should use the backgrounds automatically. If not, press TAB on your keyboard to open the MAME menu, navigate to Video Options >> Screen #0 and select "Upright_Artwork".