MMM-GooglePhotos - As Background + original width and Height of Photos

[alexbell62]

Hey,
Ive just installed MMM-GooglePhotos and the quality of the pics is not great. I wonder if this is because of this setting in config that i copie from the example:

showWidth: 1080, 
showHeight: 1920,

I wonder if there is a way to show original quality images?
Also is there a way to make the google photos a background so the other modules sit on top of it?

Thanks