When you say "physically based rendering" do you mean that one could build a PBR model based on the (unrolled?) xray data, render that model, and be able to see the ink?

edit: I found this:

https://scrollprize.org/data_browser#/samples/PHercParis4/se...

The JSON seems to suggest that I'm mostly looking at ink detection output, but I could easily be using the tool wrong.

But I also found this awesome explanation:

https://scrollprize.org/data_fragments

I guess I bunch of the training was done by using fragments of scrolls where ground truth data is available using IR photography.

Also... that xray resolution is absolutely amazing!

Some images on that page, specifically the "alpha composite" and "combined alpha" images, are a pretty simple PBR (if it's even that complex; it's just a composite rendering over a 3d array to a 2d image) rendering with no ML based ink detection in the input.