so I tried to get it from js-lil, and I couldn’t manage to copy the string out of the listener. After copying it and pasting it in the script editor, the string appears as an image within the script..
for reference, the image string is
%%IMG2ACIAGCAuAQwgEgEEIAYBAiAEAQIgEAEEIAYBAiAEAQIgDgECIAgBAiAIAQIgDAECIAgBAiAIAQIgCgECIAoBAiAGAQIgAgECIAgBAiAKAQIgBgECIAIBAiAGAQIgDAECIAYBAiACAQIgBgECIAwBAiAGAQIgAgECIAYBCiAGAQIgCAECIAYBCiAGAQIgCAECIAQBAiAKAQIgBgEMIAIBAiAKAQIgBgEMIAIBAiAKAQIgBAECIAwBBCAKAQIgBAECIAwBAiACAQogBAECIAIBDCAEAQogBAECIAIBDCAGAQIgDAECIAoBAiAGAQIgDAECIAoBAiAIAQQgCgEKIAoBBCAKAQogDgEKIBgBCiAO
and this is a screenshot of what happens: 
2 years ago(+1)
Pasting images in non-rich fields was a bug; this should be fixed now. Image strings are how images are represented in the clipboard, so you should now be able to make image-strings using normal drawing tools.
Lilt's read[] has a slightly different signature than Decker, since Decker prompts the user instead of taking a path argument; that might be what was tripping you up there.