That's usually the case for some codes since it requires a transparency layer in order for it to properly work if you want scrolling and the whole section is a scrolling texture.
But were you able to get it work? I could always try to see if I can get it working on my end if you want to send the files over and I'll send everything back to you, coding and all through PM if nej other solution is available o;
I've found a solution that allows me to have a layer underneath the eye while keeping the scrolling texture, but I can still send the files to you if you want to investigate.
Only if ya needed help fixing it up or wanting me to take a look-see since I have most of my codes saved on my other computer c:
But at least you have a solution that works for ya o: