Another question: how can we compile and use the Vulkan renderer on the main branch of gitea?

You could use this for import: I think you might have to modify the meshes though, because the game meshes are often just "flat planes" and they need some thickness for printing. Also keep in mind that a lot of the details is stored in a normal map. I think there is a way to turn the normal map into geometry via nodes editor. 

Don't use cargo but install the distribution package instead.

Hope 2026 will be good for us all.

I looked a bit in to it. The files are stored as .dae files. You should learn how to convert them to .stl so you can do it yourself and chose which model you like. Blender can export to stl and here is the wiki for blender. However I couldn't import it easy in blender since import .dae wasn't listed (arch linux) and I couldn't solve it in a reasonable time (tried searching addons inside blender, packages in the arch repo and chatGPT). I found this: https://docs.blender.org/manual/en/4.5/files/import_export/collada.html But it was a bit tl;dr at one time. I could load the models in FreeCAD which can also convert it to stl. Your slicer then should be able to scale the unit up or down. Tbh. there might be nicer models to print on thingyverse or so which take in to account that arms/arrows aren't so thin so they don't break. But converting the 0ad models shouldn't be too hard and also feasable. Other question that comes up: What's 0ad's plan if .dae support ends?