Mapshots are sometimes quite large, with a lot of areas devoid of player creations, while still stored at the same quality as populated areas.
An optional feature I propose is to take the zoomed in screenshots only in areas that have user entities somewhere in the vicinity, possible reducing quality the farther away it is from user's entities.
This can be probably done with count_entities_filtered{position=position, radius=some_radius_based_on_zoom_and_configuration, force=the_user_force}
If the savings are good enough, it can allow higher resolution images where it matters more. On the viewer side, it might require falling back to the lower resolution versions if the higher resolution isn't available.
Thanks for the mod, it's very nice and useful way to share renders of bases.
