Mirror painting /sketching

okay one major feature missing : mirror painting , it exists in Corel painter , and why not in photoshop ? , I do concept design and  Art direction  and this will tremendously help . i feel that photoshop sometimes could do a better job regarding  digital painting , also its filter gallery  didn't evolve for decades ...I missing also the anisotropic filter ( i think this was the name back then ) it use to give a very good painterly look to photographs , way better than paint daub "artist filter " .... still waiting before I try out another software