Attached is a photorealistic panorama of the Longview Community College campus (Lee's Summit, MO) for Starry Night. I followed the directions on this web site for making a photorealistic panorama for our campus but did so with a few differences.
The images were taken using a tripod and I took around 28 images for making the panorama.I then used a freeware program called Hugin-Panorama Stitcher to create the panorama. This is a very easy program to use. Normally I would have used Photoshop Elements but it kept crashing during loading the images. I had no problem with the Hugin program. Once the panorama was made, as a large Tiff image file, I loaded it into my Photoshop Elements program.
In the Photoshop editor I used the background erase tool to erase the sky from the picture. The original directions called for using an alpha channel to make a mask for the image. I wasn't sure how to do that in the Elements version but using the background eraser worked well. I did have to zoom in on the image to clean up spots I missed. To see if I had missed any places I set Starry Night for sunset. Any spots I missed would show up as reddish against the darker background. They also do not move with the sky as time advances.
The panorama and corresponding text file simply go in the Horizon Panoramas folder. I edited one of the text files in the folder to match the name for my panorama file. It was also renamed to be the first panorama and the default one at program startup. I also had to make adjustments to the positioning values as described in the original directions for making a panorama.
One other thing is that the panorama file was more than 50 Mb in size as a Photoshop psd file. Using Photoshop Elements I used the save for web function and changed the file to a png file. This reduced the file to the 7-8 Mb size it is now.