The sky came out a bit weird in the merge process.
Hi Marshall,
Not bad for a first try. Cem is right about not using a polarizer on wide horizontal panos, and they are also best not used on (ultra-)wide angle shots for the same reason. One exception, but it's an unlikely scenario, is when the center of the field of view happens to be exactly in the direction of the sun, or in the exact opposite direction. Since polarization, and thus the effect of a polarization filter, is at its maximum at a 90 degree angle to the sun direction, you'd get a sort of vignetting effect that might be somewat acceptable/curable.
Depending on the stitching program, actually its blending function, you might be able to get a somewhat more acceptable looking sky. When the appropriate parameters are chosen, in combination with a large enough overlap between the tiles, a blender like SmartBlend might produce a somewhat more gradual transition. Sometimes stiching/blending programs have a setting for 360 degree blends, which also may or may not help.
You could also try shooting a separate sky image/pano without polarizer, with the exact same sun position, and replace the sky altogether (and thus maybe add some clouds if that's appropriate). That would all be a lot of work, but it's sometimes worth the effort.
Bart
