Iridiscent Effect, is it impossible with Gimp?

[neurolurker]

You can use the attached ZIP file [unzipped] as a preset for the COLORS menu CURVES option to add an iridescent effect to an image.


  Mariah701Curve.zip (Size: 2.18 KB / Downloads: 25)

If you need help at a particular stage, please let me know and I'll send by private message a [tediously] detailed set of step-by-step instructions for installing and using the attachment.