Originally posted by arpaagent It looks like the exposure or WB changed during one of the middle exposures. You might want put your camera in manual mode and choose a specific white balance setting when doing panos so that your camera doesn't switch things up on you, especially if you are shooting JPEG. If you shot this in RAW you should be able to go back and set all the white balance settings the same and re-export them or whatever.
Other than that, it looks great! The grand canyon sure is magnificent.
Thanks for the tips. I saw the white balance was off after pulling them together. These were shot in aperture priority with AWB in JPEG... It was also extremely hazy (105 degrees) and the sun would have been coming from the left to right in the picture. I'll try your suggestion for my next one!