Free Repository for Tile Graphics?
Hentai asks: "I want to make a game. Specifically, I want to make a good, open-source computer RPG, with the same artistic style of the early Squaresoft sprite-pushers, like Secret of Mana and Chrono Trigger. I can code well enough, and I can get artists to provide character sprite graphics (which will be open-source, too), but I need background tile graphics on the same vein and caliber as those titles. Web searches invariably lead to commercial or shareware packages, or 'free to the public' tile sets that are, frankly, abysmal. I just need enough quality tiles to start with, and will happily add any new derivations to the repository. Anyone know of a good GPLed tile package that could get me started?"
It's not in the style you desire though - so -1, offtopic, I guess :(
If you want to make background tiles from other non-background tile images, read through the short Make seamless tutorial.
http://tinyurl.com/4ny52