The easiest way to add a background to a still image
Can you tell me an easy way to add a background image like this Lens?
Where can I find a suitable template?
https://www.snapchat.com/unlock/?type=SNAPCODE&uuid=516342bc05d640a8a482e50170111d9c&metadata=01
Take a look at the template called "Segmentation" to learn how to do that