I hoped to have tundra creatures show with winter deadcold, but although yeti was listed in region-pops list-all, it didn't show it's face (then again, so was kea which definitely didn't have a biome to spring from). Maybe I was simply unlucky, then? It is not like it's a given. Though it'd make for a neat garbage disposal.
Was wondering about dwarf-made pools and wet plants (Muck Root, Kobold Bulb, Rat Weed, Fisher Berry, Rope Reed, Sun Berry and Willow tree).
Dug channels on poolless grassland and filled them with river sources from liquids plugin.
At first glance, it seems to still leave the ground dry....
But near river sources, the wet plants can spring forth (I then replaced the river sources with obsidian floors and the rat weed died a month or so later - though cats keep running across the map.).
Then on a different map (had a segfault when investigating dead almond sapling that shouldn't have possibly existed), did it properly with just planting 7/7 water after channel and got no wet plants.
I guess only thing that remains to test is retire and unretire....And this world is expendable.
*does just that*
Nooope, after 5 seasons total. At least both tests got pond turtles, which is kinda weird mismatch.