That particular photo is actually the result of a technique I tried for the first time in Photoshop. When I stitched the photos together, the resulting image area had a slight U-shape to it as I must have angled the camera slightly between photos. To correct this, I used Photoshop's Lens Correction utility (Filter > Distort > Lens Correction). This allowed me to angle and distort the image as needed so I could crop it into a rectangular frame while preserving as much of the image area as possible. I also used this technique on the Red Shack photo.