I have used PanoVolo to stitch photos taken by my DJI Drone. After a corruption in my SD card, I managed to retrieve the 137 photos taken with the drone's 70mm camera for a 360 panorama, but they came without the metadata that is so useful in stitching. PanoVolo still managed and did an amazing job, with only a few artifacts in the ocean. I was suprised how fast it did the job too! It can make the panorama using the RAW dng files and then produces a high-resolution 16 bit TIFF (2GB!) that is sutable for post adjustments. The developer answered my emailled questions personally and immediately, which is deeply appreciated. This is a briiliant piece of software that is ridiculously easy to use and yet produces outstanding results!