This was originally a sketch that I did by hand. When I drew this, I wanted it to feel like a quick drawing accentuated by the contrast of the off-white art board. In the original drawing, the misty buffalo in the background were a lot more defined. After bringing this into photoshop, I wanted to play around with it and see how I could change it. I started by sharpening it and bringing up the darks a little bit more. I then cropped it to a 5 x7 and used the art history brush tool over most of the picture. I went back and used the history brush in order to bring back the detail of the middle bison. Lastly I added a slight radial gradient to the photo to darken the corners.