That artificial brightness limitation sounds especially diabolical, people should be able to enjoy high brightness as it (potentially) existed and not have to deal with hard-coded limitations. I'm not from mame though.
Rendering dots using circle texture sounds nice but why are the dots in your renderings the size of something from pac-man? They look comically large.
Changes due to seasons are an annual cycle. Climate is more about the longer-term (decades) weather patterns of a place, including the range of its typical seasonal differences. They aren't comparable the way that you're trying to say that they are.
Rendering dots using circle texture sounds nice but why are the dots in your renderings the size of something from pac-man? They look comically large.