VNDB - https://vndb.org/v248
Sources: Never7 -the end of infinity- for Sony PlayStation 2 (Never7 CGs/BGs), Infinity Museum (Infinity PSX CGs)
Tools for dumping: https://github.com/malucard/kidfile
Never7 -the end of infinity-'s images are in 640x480 due to the original PC release have abysmal image quality (Dreamcast CGs were bilinear upscaled to 800x600 while BGs have heavy dithering effects which are not present in the PlayStation 2 assets). Assets found in Infinity Museum are in 1024x767 and so far the highest known resolution for Infinity PSX (and some Never7) CGs.