While I can’t discern your total theme from just those photos, it appears to be more of a medieval European age for the setting? Why not try some potted plants and other ornaments that would be wide-spread during said era, or whatever era you’re basing this off? Personally, I’d go for more realistic chairs, but once again, I don’t know your theme.
Looks very nice may you include, the theme for the photos my suggestions:
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If your theme is a medieval European age then you can add some. Trees,Garden,Grass in the empty areas and you can add a circle pond in the backyard to fit the Medieval European house…
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You can add some fences around the garden place, and some potted flower plants in different kind of. Areas and by the house also! and can add a more realistic tent.
These are just some of the suggestions i have instill, we know the theme of it!
Some plants, or a patch pf grass with plants.