Hack a different thumbnail for lightbox?

I know it’s been a requested feature for the lightbox, and I’m hoping we get the option to do this soon, but in the meantime: are there any big brains that can help us hack a way to show a different thumbnail for the lightbox? In other words, I want to specify one image as the gallery thumbnail for the lightbox, and a different image/video once you’ve clicked on the thumbnail and opened the Lightbox. A small, cropped version of the large image for the gallery just isn’t aesthetic enough.

Any help really appreciated :slight_smile: