I basically just added some gradients with the airbrush and played around with layer modes! It basically comes down to playing with contrast, gradients, and layer modes until things look right. Don't be afraid to use those tools at your disposal! I personally used add and multiply to get the effect I wanted, but experiment with different layer modes and see what works best! I would also go in with a correction layer (if your art program has them) afterwards if you still aren't happy with the effect and play around with the contrast, brightness, and saturation settings. You got this!! | Artwod Feedback