Slabbed 0.2.0-beta.4

Slabbed 0.2.0-beta.4 is a major interaction-stability update for slab-supported building.

This release focuses on making common objects sit, target, and interact more consistently on slab-supported structures. A lot of previously cursed behavior around hitboxes, outlines, targeting, floating objects, and server/client disagreement has been improved.

This is still a beta. It does not claim universal support for every Minecraft block or item category yet.

Highlights

• Major targeting and hitbox improvements for slab-supported objects.
• Better visual contact for many objects placed on lowered slab-supported structures.
• Improved server-side validation for lowered trapdoors and regular doors.
• Fixed several cases where the client selected the correct visible object but the server rejected or snapped the interaction back.
• Improved fence, wall, fence gate, chain, lantern, button, trapdoor, and door behavior around lowered slab structures.
• Added large proof coverage for common slab-supported object families.
• Added release-readiness audits and jar/classpath checks for the beta.4 release candidate.

Object targeting and hitbox improvements

Beta 4 includes a large pass on visible-object ownership and hitbox targeting.

Improved behavior includes:

• Crosshair targeting more reliably selects the visible object instead of the slab/support block underneath.
• Visible objects on lowered slab-supported structures now hold ownership more consistently.
• Hitboxes, outlines, raycasts, and visual placement feel are better aligned across many supported object categories.
• Several “I can see the object, but Minecraft thinks I’m clicking something else” cases were fixed.

This affects many common building objects, including:

• Torches
• Candles
• Flower pots
• Buttons
• Trapdoors
• Regular doors
• Chains
• Lanterns
• Fences
• Walls
• Fence gates
• Stairs in audited slab-supported setups
• Ordinary blocks in audited slab-supported setups

Trapdoors and doors

Trapdoors and regular doors received major stability fixes.

Trapdoors

• Fixed lowered trapdoors being targetable but not staying open.
• Fixed server-side shifted validation for lowered trapdoor interactions.
• Fixed cases where trapdoors would appear to open and then snap closed.
• Improved trapdoor targeting around slab-supported structures.

Regular doors

• Fixed regular doors losing target ownership to the support slab underneath.
• Fixed upper/lower door-half interaction instability.
• Fixed cases where one half of a lowered door would interact correctly while the other half blinked, failed, or snapped back.
• Added paired-door interaction proof so upper and lower halves stay consistent.

Buttons

• Fixed floor buttons visually floating above certain lowered slab-supported surfaces.
• Improved button contact alignment.
• Improved button hit acceptance in slab-height interaction cases.
• Server-side validation now handles supported lowered button targets more consistently.

Fences, walls, and fence gates

Fences, walls, and fence gates received a large visual/contact/targeting pass.

Improvements include:

• Better contact with visible support surfaces.
• Fixed cases where walls/fences floated or sat at the wrong height.
• Improved stacked fence/wall behavior.
• Improved visual hitbox and stack-aim behavior.
• Preserved tall collision where appropriate while aligning visual selection and targeting with the visible object.
• Fixed server-side interaction issues for supported lowered fence/wall contexts.

Chains and lanterns

• Improved chain target ownership and visible interaction behavior.
• Improved chain behavior in slab-supported hitbox/targeting contexts.
• Lanterns are included in the audited SBSBS top-visible-support matrix.
• Chain axis metrics remain internally tracked, but chain visible-owner behavior is much more stable.

Torches, candles, and flower pots

Beta 4 includes major fixes for small floor-supported objects.

Torches

• Improved floor torch placement on lowered slab-supported structures.
• Fixed visual contact issues where torches appeared to float or sit at the wrong level.
• Improved torch targeting and placement acceptance in supported slab contexts.

Candles

• Improved candle floor/top contact on slab-supported surfaces.
• Fixed contact gaps in audited supported cases.

Flower pots

• Improved flower pot placement, contact, and survival behavior.
• Added survival checks so flower pots remain only when genuinely supported.

Common object compatibility

Several common full-block or object-like cases received contact, triad, or compatibility work.

Audited or improved object families include:

• Chests
• Barrels
• Furnaces
• Bookshelves
• Crafting tables
• Enchanting tables
• Stonecutters
• Grindstones
• Anvils
• Fences and walls
• Fence gates
• Doors and trapdoors

This does not mean every block-like object in Minecraft or every modded object is fully supported yet. It means these common categories received focused stabilization and proof coverage.

SBSBS / stacked slab-supported structure audit

Beta 4 includes a focused SBSBS held-item acceptance audit.

The audited top-visible-support matrix passed for:

• Stone
• Stone slab
• Stone stairs
• Birch trapdoor
• Spruce door
• Acacia button
• Torch
• Candle
• Flower pot
• Iron chain
• Oak fence
• Cobblestone wall
• Oak fence gate
• Lantern

The audit found no reproduced release-blocking RED rows for that tested top-visible-support structure.

Not covered by that matrix:

• Glass panes / panes
• White carpet / carpets / thin top layers

This means Beta 4 improves many common SBSBS-style interactions, but it does not claim universal support for every possible side-face, against-face, or thin-layer case.

Slab lane and placement behavior

Beta 4 includes many fixes around lowered slab-supported placement and targeting.

Improvements include:

• Better handling of lowered slab-supported visible targets.
• Improved placement inheritance in audited lowered slab-lane cases.
• Better preservation of visible object ownership before slab/support rescue logic steals the target.
• Improved server/client agreement for shifted interactions.

Known limitation:

Some slab placement or break neighbor updates can still visually re-resolve lowered slab lanes in specific stacked builds. This is tracked as:

SLAB_PLACEMENT_LANE_JUMP_DEFERRED_NO_NAMED_LEGAL_LANE

Credits

Special thanks to steve6472 for a detailed investigation PR that helped inform Beta 4’s hitbox, targeting, and slab-placement stability work.

Thank you to everyone who issued a bug report on GitHub! Your contributions help power Slabbed development :3