Possibly. I also wonder if there is a free model we could use as a basis. 

These are the artefacts that I wanted to get rid of. The face at the nose was too small so it didn't bake there and just appeared black. In the first version I just moved it in the uv layout, but it still wasn't clean. So now I used an island margin of 0.001 instead of 0.004, then scaled up the uv islands of the caryatids, and packed again. This time nature is included. I also imported the cypress. The bake worked in blender but somehow it doesn't show in atlas: Also the bake of the climbing plants highlights the edges a little too much: So these are the old and the new ao now:   I've attached the new version with the updated meshes, ao map and the nature actor file. I don't think it's much of a difference, only the caryatids faces are a little cleaner. I don't really see an impact from the inclusion of the cypresses, maybe it's got to do something with the materials? I'm not sure if I'm using the right ones. About the island margin, as long as I don't want to scale further down, I don't need a higher margin, or do I?   2117024587_erechtheion0_28.3.zip

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Sounds like it warrants a regression ticket 

A small annoyance is also the inability to close console with the associated hotkey if it's printable character. Comparing with a27 it did work there.