DNG isn't exactly rarely used, it's Adobe's open raw format and lots of image processing programs read and write it. It's not a codec made for one game back in

DNG isn't exactly rarely used, it's Adobe's open raw format and lots of image processing programs read and write it. It's not a codec made for one game back in 1994, it's still in very active use today if you're using such a rare and uncommon program as Photoshop.