if you wanna do that go for it, but our 2d overhaul is by in large original content, if not created by us, then the exception is created by square (artwork avatars). Filters can be helpful, but are not a be all answer to making nice images.
Here is the ground i made for our test:
the issues with photosourcing, they usually dont til well, and you'll need a lot of tiles for this many bricks
also... yes the ground has bricks on it.. its not a wall though! cobblestone, ever heard of it? its not the same. anyhow, most of the work that'll make an image more real is in the grunge. adding a brick pattern doesnt do much on its own other than make it look fake. you need to put a personal touch on your art otherwise it looks like stock images, and for all the work we do on ff7, i'm not gonna lower our standard to stock.