There are introduction year and end year options. In few cases I set these years, but I let players to use them at its discretion. But introduction year for old flats will be 1950, a for modern ones 1990. I set year 1990 for supermarkets for example.
Thanks to screenshots competition I discover this option and I play sub-arctic in combination with temperate landscape. But the right answer for me is sub-arctic I asked because I wanted to know how many people use SNOW versions. Gradually I want to add SNOW versions to to most of my objects.
In 12 hours, I'll release Fridaemon's Objects 3.1 with these blocks of flats, I need to add Snow Roofs to the rest of them.
Beach Objects * Shopping Centres * Skyscrapers * Garage Entrances
Modular Warehouses * Trucks & Buses Parking Lots * Bus Depots * Bus Terminals
Road Waypoints * Road Stops * Eyecandy Objects * Building Set Winner of the Screenshot of 09/20, 11/20, 02/21, 06/21, 07/21, 05/22 and 06/22.
Well, the only thing I can say is that I regret that all those years ago when I started making GRF's that I didnt know about Alpine Climate (temperate grass in sub-arctic) and how to add snow-versions.
It is now the only way I want to play, I really like the change of seasons.
So, I would advise, if you want to put in the effort of making snow-versions, then please do so
you know, I play an average of about 1000 years on a script, I prefer to have all the objects at hand, and I still go back to some years and vice versa it is tedious.