elexis is working on making the GUI more moddable, so we'll see. However the game can bundled without modio, so it will likely still be in the same window. I think images were not displayed for security reasons, can be wrong.
Nice job dude! That's looking super cool! I was brought here by the 0AD twitter account. I'm a mesoamerican archaeologist and a historical ilustrator, and I'm open for discussion and advising if needed regarding any faction of the cultural region (as well as texturing if I can find the time).
Here's my portfolio, hope you are still working on the subject: https://www.artstation.com/rafael-mena
Most of the text posted is in Spanish which was translatable by Google but has stopped working get a "try again" pop up in a endless loop is seems to get confused as there are several differing languages on each page which boils down to the fact that I can no longer follow anything though using copy/paste in a separate Google Translate page may work I have not tried that yet I'm a bit lazy like most humans.
Enjoy the Choice