Does Creative studio have a resolution limit? Is it phone dependent?

[WPCentral Question]

Really liked one filter. So I put a big jpeg image (20m pixel), and open it in Creative Studio, however, it saved it in a small 4mp jpeg.

 

[someone2639]

Usually, Creative Studio uses the shareable 4-5 mp file that's saved with the 20 mp. How not to do it? I have no idea.