Fixed 2Mb size limit for "Google Play edition" ?

[OLE67]

I recently installed the GalleryGoogle.apk taken from the Google Play Edition of the Samsung GS4 on my GT-i9505 GS4.
All of my 360? Photosphere images are only 2Mb total each, I havent found any way to change this to a higher
resolution, is this possible? Is it different on other stock versions of Google's Photosphere? I am using the 13 megapixel setting.

Thanks for any input,

Ole