Every season changes colors depending on region. conifers in north Canada or Alaska and other colder areas will remain green no matter what season you choose. Tropical areas will stay green all year long.
All trees now have normal and natural size, depending on region. Some trees have been enlarged (mostly within cities to match real life trees. Some trees have been reduced in other places. This is done based on research and studying images from Google and Bing data. You will notice denser vegetation in most areas.