@Thalatta Thanks for your research and explanation! I'll go with this one then. That was actually what I started with, but the reference doesn't help much. It's basically just two cuboids put on each other and filled up with props. It will look too empty for the 0-A.D.-style. I would need some ideas of how I could give it a more interesting shape, or add fences, windows, doors, awnings, curtains, canvas, columns etc... It's also much smaller than the corresponding stone skene in the later theaters. If we want it to be upgradeable it should have the same footprint, which means I have a lot of space to fill up. If you got ideas, let me know  I'll try to be creative (which is not my strong point :D) and then it hopefully won't be too far from historical accuracy.

Just in case, I meant when taking a screenshot. For the player to constantly see it could be optional.

And then after the wooden one is done, maybe remove the tiled rooftop from the skene of the 'stone' theater?     Make it a flat roof (with a small lip around the edge) with a trap door on top and a crane? So, keep the U shape of the skene, but remove the angled tiled roof.  We can keep the tiled actor to give to the Seleucids and Ptolemies or something, while Athenians get the new flat-roofed+crane version.

Sorry if I overloaded something, I uploaded the files a couple of times trying to find out the problem 

Is the mod structure supposed to be like this: modname.zip --mod.json --modname.zip ----mod.json ----modfiles or: --modname.zip ----mod.json ----modfiles