ZeroGravitas
The Destroyer
Some of you probably saw me post a gif about this phenomena to the sub-reddit the other day, clearly showing a glowing blue mushroom spawning and immediately popping off an actuated mushroom grass block. Taken while inspecting @PapaBear 's compact fishing complex build (first world version):
The trick is that the blocks must be at surface height or above.
Is this better known than I realised? It seems like it didn't happen in 1.2.4.1, back when I was messing around more with such things. In an old video by Hero it looks like they just grew as normal, but didn't pop off. But @HappyDays sees the same effect as me, in a video he released the same day as my Reddit post, but didn't comment (hence I wondered if it wasn't surprising, already known...?).
Anyway, this isn't a huge find. Mostly it just seems to mean that you can make a more compact blue mushroom auto-farm by simply leaving your blocks actuated. AFK it by standing underneath, adding a minecart track whatever. Only really useful for shroomite armour (and mushroom building materials). But interesting because the mushroom spawn rate will be constantly maxed out, rather than tapering off to an asymptote, as the surface space fills up with growth.
Beyond the 'shroom rain: obviously these setups drop blue mushroom grass seeds
(which might have been helpful, if they had any use (on PC) that the blue solution couldn't cover).
It turns out jungle grass
will do the same trick. Not nearly as dramatically bountiful, but it will rain down the following:
jungle grass seeds,
jungle roses ,
Grubby,
Sluggy and
Buggy. So potential AFK bait farming, although spawn rate seems pretty poor. Bushes will not appear while surface is actuated (to background), nor trees, etc, obviously. I don't know about planterra bulbs, although I would have though @DicemanX would have observed something in one of his builds if they spontaneously appeared and popped...
I've not seen anything drop from any other the other grasses:
regular,
hallowed,
crimson,
corrupt.
I tested big, T-Edited columns of differing row spacings, placed surface height, up to space, although testing was fairly brief. So I've probably missed something along the way. Other stuff 'grows' on various, seemingly inert block types (in hardmode, etc), and not tested any of those. Certainly seems likely that there will be other weird effects like this lurking within the game still..... 
The trick is that the blocks must be at surface height or above.
Is this better known than I realised? It seems like it didn't happen in 1.2.4.1, back when I was messing around more with such things. In an old video by Hero it looks like they just grew as normal, but didn't pop off. But @HappyDays sees the same effect as me, in a video he released the same day as my Reddit post, but didn't comment (hence I wondered if it wasn't surprising, already known...?).
Anyway, this isn't a huge find. Mostly it just seems to mean that you can make a more compact blue mushroom auto-farm by simply leaving your blocks actuated. AFK it by standing underneath, adding a minecart track whatever. Only really useful for shroomite armour (and mushroom building materials). But interesting because the mushroom spawn rate will be constantly maxed out, rather than tapering off to an asymptote, as the surface space fills up with growth.
Beyond the 'shroom rain: obviously these setups drop blue mushroom grass seeds
It turns out jungle grass
I've not seen anything drop from any other the other grasses:
I tested big, T-Edited columns of differing row spacings, placed surface height, up to space, although testing was fairly brief. So I've probably missed something along the way. Other stuff 'grows' on various, seemingly inert block types (in hardmode, etc), and not tested any of those. Certainly seems likely that there will be other weird effects like this lurking within the game still.....
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