Well, on Advance Map 1.95, if you use the DNS system, you can actually change your map according to seasons. Like, there's a drop-down list, and it says "Day, Night, morning, summer, fall, spring, and winter" You can change the map for every single one of those and it would only be active during that season. So, you could have it all sunny for Summer, then do something where the leaves fall on some of the trees in the fall, and have everything snow-capped for the winter.