The bug
When the block data values were removed, and fully replaced with block states, the ability to set the block state on superflat worlds was lost. You used to be able to set the data value in the preset.
This preset is expected to work and place top slabs, but it doesn't.
minecraft:stone_slab[type=top];minecraft:the_void;decorationNo format actually exists anymore to set block states in the superflat preset.
This goes for both the world generation menu, and custom dimensions.
Linked issues
relates to 1
Attachments
Comments 17
I can also confirm the issue happening on 20w49a - when trying to make pistons facing up via flatworld preset, no matter what I try, the preset gets reset to default one.
The second line is the syntax that's expected to work (it matches commands), so when fixing this, please use that syntax.
Affects 1.21. I'd like to request ownership of this report, as it has an inactive owner that can no longer maintain it.
[Mod] Jingy
Can confirm for MC 1.12.1.