No harder than some of the other minor miracles they're pulling off in 1.3.6Could this be made as a mod? Sounds and looks like it's really hard to make.
Good point, depending on stylistic preferences I might advocate for the addition of a foreground if this went forward.I thought the idea was cool but I have something to say: there is no foreground in Terraria, because no object or scenario of the game passes in front of the player, that is, it is not behind something. the "middleground" exists: the solid blocks. And the background is everything that goes behind the player.
I always hate getting a corruptio-ocean biome, since i usually put my angler at the ocean because loldevs could also make transition between biomes smoother and visible on the background. Like instead of the whole background changing suddenly, one landscape could be next the other. Especially good for corruption and ocean biomes which have a too harsh transition.