Hi and thanks for contacting us here!
You would need to render a sequence of standalone 360 degree product images (preferably jpg) using your 3d software and then import the images into WebRotate 360 SpotEditor that you can download
here. Usually you would animate a virtual camera around the object or animate the object itself and render the image sequence accordingly.
PS: we now also offer photorealistic
3d rendering service where we can take your 3d product model (e.g fbx) and render the images for you on our end.
Here's our user guide just in case:
https://webrotate360.s3.amazonaws.com/sites/webrotate360/downloads/Resources/Readme.pdf