I agree with Roli, that I would have submitted or accepted this as separately eligible. I even referenced this (admittedly outdated now) guideline in the supporting on a mural like this, so I have the link:
March 2019
Q41: For a large potential portal object(such like a long relief wall), some agents regard it as an entirety, but others will choose to shoot lots of photos to cut apart and submit each of them(and in order to avoid too close distance, usually they’ll be mismatched) to OPR. What’s your suggestion about the situation, shall we submit it as a single one or dividing it into a lot is also acceptable?A41: The guidance from NIA OPS is that it really depends on the mural. It’s hard to create a one size fits all rule for art installations like this. An example is a mural that has distinct sections to it that tells a story with each different panel. Submitting each section can help players discover and understand the individual aspect of the mural in a better way and the message that is trying to be conveyed.
An answer from the most recent AMA did not say that these old clarifications don’t matter, unless they are in conflict with more current guidelines, and I don’t see a more current guideline.