These are more shells I did. I used an app called Decim8 after I shot the shells.
Decim8 takes pixels and mixes them up and down and sideways. It is known as a Glitch app. There are several Glitch apps out there for iPad and iPhone but this is one of the better ones. Unfortunately this one really only works on the iPhone.
It is slow and crashes on both generations of the iPad.
I have a first generation iPad and it really gives me fits.
One thing that helps is to reboot the iPad prior to using the app.
The good news is Apple is coming out with new iPad Pros in June.