OK so I can get a folder to create on my Samsung Galaxy S3 just fine and saving works within the new folder, but it won't create a folder on my Nexus 7. Not sure if it's a bug or because the Nexus 7 only has internal storage...
Any advice on this? Perhaps I can check when saving if the "FaceMaker" folder exists, and if not, then attempt to use DCIM/Photos? Or is there a better option?
Edit: Scratch that, the folder seems to have appeared.
There's still the matter of the offset image saving though.