Hi there! I think you are using PNG images with transparent background in which case there's one setting that you would need to turn off in the script. New SpotEditor v3.5 would turn it off by default on Publish for PNG images.
If you can send me a link to your page with the 360, I would let you know exactly what needs to be done. You can send us your test URL to support at webrotate360 dot com.