Custom blocks can be made to act like Vanilla stairs by using the minecraft:corner_and_cardinal_direction state in the minecraft:placement_direction trait. Unfortunately, this trait can fail to apply corner states correctly. This has been observed with inner self-connections but may exist in more circumstances.
Workaround available
The minecraft:connection trait can be enabled to make corner connections work as expected. However, this is unreasonable, as it multiplies the number of permutations by 16.
Demonstration
This bug can be seen in the following screenshot:
The corner states are being set to "none”. Other situations, including cornering with Vanilla stairs, work correctly:
Reproduction
The code below was used for the custom calcite stairs shown above:
{
"format_version": "1.26",
"minecraft:block": {
"description": {
"identifier": "bug_stairs:custom_stairs_without_connection",
"traits": {
"minecraft:placement_position": {
"enabled_states": ["minecraft:vertical_half"]
},
"minecraft:placement_direction": {
"enabled_states": ["minecraft:corner_and_cardinal_direction"],
"blocks_to_corner_with": [{"tags": "q.all_tags('minecraft:cornerable_stairs')"}]
}
}
},
"components": {
"tag:minecraft:cornerable_stairs": {},
"minecraft:geometry": {
"identifier": "geometry.bug_stairs.stairs.right_side_up",
"bone_visibility": {
"east": "q.block_state('minecraft:cardinal_direction') == 'east' && q.block_state('minecraft:corner') != 'outer_left' && q.block_state('minecraft:corner') != 'outer_right'",
"east.southwest": "q.block_state('minecraft:cardinal_direction') == 'east' && q.block_state('minecraft:corner') == 'inner_right'",
"east.northwest": "q.block_state('minecraft:cardinal_direction') == 'east' && q.block_state('minecraft:corner') == 'inner_left'",
"west": "q.block_state('minecraft:cardinal_direction') == 'west' && q.block_state('minecraft:corner') != 'outer_left' && q.block_state('minecraft:corner') != 'outer_right'",
"west.southeast": "q.block_state('minecraft:cardinal_direction') == 'west' && q.block_state('minecraft:corner') == 'inner_left'",
"west.northeast": "q.block_state('minecraft:cardinal_direction') == 'west' && q.block_state('minecraft:corner') == 'inner_right'",
"south": "q.block_state('minecraft:cardinal_direction') == 'south' && q.block_state('minecraft:corner') != 'outer_left' && q.block_state('minecraft:corner') != 'outer_right'",
"south.northeast": "q.block_state('minecraft:cardinal_direction') == 'south' && q.block_state('minecraft:corner') == 'inner_left'",
"south.northwest": "q.block_state('minecraft:cardinal_direction') == 'south' && q.block_state('minecraft:corner') == 'inner_right'",
"north": "q.block_state('minecraft:cardinal_direction') == 'north' && q.block_state('minecraft:corner') != 'outer_left' && q.block_state('minecraft:corner') != 'outer_right'",
"north.southeast": "q.block_state('minecraft:cardinal_direction') == 'north' && q.block_state('minecraft:corner') == 'inner_right'",
"north.southwest": "q.block_state('minecraft:cardinal_direction') == 'north' && q.block_state('minecraft:corner') == 'inner_left'",
"northwest": "(q.block_state('minecraft:cardinal_direction') == 'west' && q.block_state('minecraft:corner') == 'outer_right') || (q.block_state('minecraft:cardinal_direction') == 'north' && q.block_state('minecraft:corner') == 'outer_left')",
"southwest": "(q.block_state('minecraft:cardinal_direction') == 'west' && q.block_state('minecraft:corner') == 'outer_left') || (q.block_state('minecraft:cardinal_direction') == 'south' && q.block_state('minecraft:corner') == 'outer_right')",
"northeast": "(q.block_state('minecraft:cardinal_direction') == 'east' && q.block_state('minecraft:corner') == 'outer_left') || (q.block_state('minecraft:cardinal_direction') == 'north' && q.block_state('minecraft:corner') == 'outer_right')",
"southeast": "(q.block_state('minecraft:cardinal_direction') == 'east' && q.block_state('minecraft:corner') == 'outer_right') || (q.block_state('minecraft:cardinal_direction') == 'south' && q.block_state('minecraft:corner') == 'outer_left')"
}
},
"minecraft:material_instances": {
"*": {"texture": "calcite"}
}
},
"permutations": [
{
"condition": "q.block_state('minecraft:vertical_half') == 'top'",
"components": {
"minecraft:geometry": {
"identifier": "geometry.bug_stairs.stairs.upside_down",
"bone_visibility": {
"east": "q.block_state('minecraft:cardinal_direction') == 'east' && q.block_state('minecraft:corner') != 'outer_left' && q.block_state('minecraft:corner') != 'outer_right'",
"east.southwest": "q.block_state('minecraft:cardinal_direction') == 'east' && q.block_state('minecraft:corner') == 'inner_right'",
"east.northwest": "q.block_state('minecraft:cardinal_direction') == 'east' && q.block_state('minecraft:corner') == 'inner_left'",
"west": "q.block_state('minecraft:cardinal_direction') == 'west' && q.block_state('minecraft:corner') != 'outer_left' && q.block_state('minecraft:corner') != 'outer_right'",
"west.southeast": "q.block_state('minecraft:cardinal_direction') == 'west' && q.block_state('minecraft:corner') == 'inner_left'",
"west.northeast": "q.block_state('minecraft:cardinal_direction') == 'west' && q.block_state('minecraft:corner') == 'inner_right'",
"south": "q.block_state('minecraft:cardinal_direction') == 'south' && q.block_state('minecraft:corner') != 'outer_left' && q.block_state('minecraft:corner') != 'outer_right'",
"south.northeast": "q.block_state('minecraft:cardinal_direction') == 'south' && q.block_state('minecraft:corner') == 'inner_left'",
"south.northwest": "q.block_state('minecraft:cardinal_direction') == 'south' && q.block_state('minecraft:corner') == 'inner_right'",
"north": "q.block_state('minecraft:cardinal_direction') == 'north' && q.block_state('minecraft:corner') != 'outer_left' && q.block_state('minecraft:corner') != 'outer_right'",
"north.southeast": "q.block_state('minecraft:cardinal_direction') == 'north' && q.block_state('minecraft:corner') == 'inner_right'",
"north.southwest": "q.block_state('minecraft:cardinal_direction') == 'north' && q.block_state('minecraft:corner') == 'inner_left'",
"northwest": "(q.block_state('minecraft:cardinal_direction') == 'west' && q.block_state('minecraft:corner') == 'outer_right') || (q.block_state('minecraft:cardinal_direction') == 'north' && q.block_state('minecraft:corner') == 'outer_left')",
"southwest": "(q.block_state('minecraft:cardinal_direction') == 'west' && q.block_state('minecraft:corner') == 'outer_left') || (q.block_state('minecraft:cardinal_direction') == 'south' && q.block_state('minecraft:corner') == 'outer_right')",
"northeast": "(q.block_state('minecraft:cardinal_direction') == 'east' && q.block_state('minecraft:corner') == 'outer_left') || (q.block_state('minecraft:cardinal_direction') == 'north' && q.block_state('minecraft:corner') == 'outer_right')",
"southeast": "(q.block_state('minecraft:cardinal_direction') == 'east' && q.block_state('minecraft:corner') == 'outer_right') || (q.block_state('minecraft:cardinal_direction') == 'south' && q.block_state('minecraft:corner') == 'outer_left')"
}
},
"minecraft:material_instances": {
"*": {"texture": "calcite"}
}
}
}
]
}
}{
"format_version": "1.26",
"minecraft:block": {
"description": {
"identifier": "bug_stairs:custom_stairs_without_connection",
"traits": {
"minecraft:placement_position": {
"enabled_states": ["minecraft:vertical_half"]
},
"minecraft:placement_direction": {
"enabled_states": ["minecraft:corner_and_cardinal_direction"],
"blocks_to_corner_with": [{"tags": "q.all_tags('minecraft:cornerable_stairs')"}]
}
}
},
"components": {
"tag:minecraft:cornerable_stairs": {},
"minecraft:geometry": {
"identifier": "geometry.bug_stairs.stairs.right_side_up",
"bone_visibility": {
"east": "q.block_state('minecraft:cardinal_direction') == 'east' && q.block_state('minecraft:corner') != 'outer_left' && q.block_state('minecraft:corner') != 'outer_right'",
"east.southwest": "q.block_state('minecraft:cardinal_direction') == 'east' && q.block_state('minecraft:corner') == 'inner_right'",
"east.northwest": "q.block_state('minecraft:cardinal_direction') == 'east' && q.block_state('minecraft:corner') == 'inner_left'",
"west": "q.block_state('minecraft:cardinal_direction') == 'west' && q.block_state('minecraft:corner') != 'outer_left' && q.block_state('minecraft:corner') != 'outer_right'",
"west.southeast": "q.block_state('minecraft:cardinal_direction') == 'west' && q.block_state('minecraft:corner') == 'inner_left'",
"west.northeast": "q.block_state('minecraft:cardinal_direction') == 'west' && q.block_state('minecraft:corner') == 'inner_right'",
"south": "q.block_state('minecraft:cardinal_direction') == 'south' && q.block_state('minecraft:corner') != 'outer_left' && q.block_state('minecraft:corner') != 'outer_right'",
"south.northeast": "q.block_state('minecraft:cardinal_direction') == 'south' && q.block_state('minecraft:corner') == 'inner_left'",
"south.northwest": "q.block_state('minecraft:cardinal_direction') == 'south' && q.block_state('minecraft:corner') == 'inner_right'",
"north": "q.block_state('minecraft:cardinal_direction') == 'north' && q.block_state('minecraft:corner') != 'outer_left' && q.block_state('minecraft:corner') != 'outer_right'",
"north.southeast": "q.block_state('minecraft:cardinal_direction') == 'north' && q.block_state('minecraft:corner') == 'inner_right'",
"north.southwest": "q.block_state('minecraft:cardinal_direction') == 'north' && q.block_state('minecraft:corner') == 'inner_left'",
"northwest": "(q.block_state('minecraft:cardinal_direction') == 'west' && q.block_state('minecraft:corner') == 'outer_right') || (q.block_state('minecraft:cardinal_direction') == 'north' && q.block_state('minecraft:corner') == 'outer_left')",
"southwest": "(q.block_state('minecraft:cardinal_direction') == 'west' && q.block_state('minecraft:corner') == 'outer_left') || (q.block_state('minecraft:cardinal_direction') == 'south' && q.block_state('minecraft:corner') == 'outer_right')",
"northeast": "(q.block_state('minecraft:cardinal_direction') == 'east' && q.block_state('minecraft:corner') == 'outer_left') || (q.block_state('minecraft:cardinal_direction') == 'north' && q.block_state('minecraft:corner') == 'outer_right')",
"southeast": "(q.block_state('minecraft:cardinal_direction') == 'east' && q.block_state('minecraft:corner') == 'outer_right') || (q.block_state('minecraft:cardinal_direction') == 'south' && q.block_state('minecraft:corner') == 'outer_left')"
}
},
"minecraft:material_instances": {
"*": {"texture": "calcite"}
}
},
"permutations": [
{
"condition": "q.block_state('minecraft:vertical_half') == 'top'",
"components": {
"minecraft:geometry": {
"identifier": "geometry.bug_stairs.stairs.upside_down",
"bone_visibility": {
"east": "q.block_state('minecraft:cardinal_direction') == 'east' && q.block_state('minecraft:corner') != 'outer_left' && q.block_state('minecraft:corner') != 'outer_right'",
"east.southwest": "q.block_state('minecraft:cardinal_direction') == 'east' && q.block_state('minecraft:corner') == 'inner_right'",
"east.northwest": "q.block_state('minecraft:cardinal_direction') == 'east' && q.block_state('minecraft:corner') == 'inner_left'",
"west": "q.block_state('minecraft:cardinal_direction') == 'west' && q.block_state('minecraft:corner') != 'outer_left' && q.block_state('minecraft:corner') != 'outer_right'",
"west.southeast": "q.block_state('minecraft:cardinal_direction') == 'west' && q.block_state('minecraft:corner') == 'inner_left'",
"west.northeast": "q.block_state('minecraft:cardinal_direction') == 'west' && q.block_state('minecraft:corner') == 'inner_right'",
"south": "q.block_state('minecraft:cardinal_direction') == 'south' && q.block_state('minecraft:corner') != 'outer_left' && q.block_state('minecraft:corner') != 'outer_right'",
"south.northeast": "q.block_state('minecraft:cardinal_direction') == 'south' && q.block_state('minecraft:corner') == 'inner_left'",
"south.northwest": "q.block_state('minecraft:cardinal_direction') == 'south' && q.block_state('minecraft:corner') == 'inner_right'",
"north": "q.block_state('minecraft:cardinal_direction') == 'north' && q.block_state('minecraft:corner') != 'outer_left' && q.block_state('minecraft:corner') != 'outer_right'",
"north.southeast": "q.block_state('minecraft:cardinal_direction') == 'north' && q.block_state('minecraft:corner') == 'inner_right'",
"north.southwest": "q.block_state('minecraft:cardinal_direction') == 'north' && q.block_state('minecraft:corner') == 'inner_left'",
"northwest": "(q.block_state('minecraft:cardinal_direction') == 'west' && q.block_state('minecraft:corner') == 'outer_right') || (q.block_state('minecraft:cardinal_direction') == 'north' && q.block_state('minecraft:corner') == 'outer_left')",
"southwest": "(q.block_state('minecraft:cardinal_direction') == 'west' && q.block_state('minecraft:corner') == 'outer_left') || (q.block_state('minecraft:cardinal_direction') == 'south' && q.block_state('minecraft:corner') == 'outer_right')",
"northeast": "(q.block_state('minecraft:cardinal_direction') == 'east' && q.block_state('minecraft:corner') == 'outer_left') || (q.block_state('minecraft:cardinal_direction') == 'north' && q.block_state('minecraft:corner') == 'outer_right')",
"southeast": "(q.block_state('minecraft:cardinal_direction') == 'east' && q.block_state('minecraft:corner') == 'outer_right') || (q.block_state('minecraft:cardinal_direction') == 'south' && q.block_state('minecraft:corner') == 'outer_left')"
}
},
"minecraft:material_instances": {
"*": {"texture": "calcite"}
}
}
}
]
}
}The bone visibility can be safely ignored; it is the states themselves that are not being applied properly.
The code was taken from the behavior pack inside the following world:
[media]
This world can be opened (in Minecraft Preview) for inspection or unzipped to access the code associated with such. Also included are demos involving custom stairs that include the minecraft:connection block trait.
This appears to duplicate MCPE-232019.