Draw something and put in into the real world, on a wall or otherwise. You can use the perspective tool in GIMP and probably other programs. Actual IRL graffiti is also welcome!
Thread inspired by: https://firstname.lastname@example.org,-2.5611005,3a,15y,142.46h,88.31t/data=!3m6!1e1!3m4!1s8Tvda0NrE_EhwmIwHRMjVw!2e0!7i16384!8i8192
Love her. You can do better with the shop work though. More transparent and white balancing
said. First one's too saturated and doesnt have grain to match the background, could also use a texture overlay and feather the edges a bit.