0.3.0-beta.2 — hotfix

• Fixed: Terrain Slabs compatibility silently did nothing against the current Terrain Slabs mod (3.x). 0.3.0-beta.1 only detected the legacy mod id "terrainslabs", but modern Terrain Slabs uses "terrain_slabs" — so the compat layer never activated (no slab classification, no lowering). Slabbed now recognizes both the modern (terrain_slabs) and legacy (terrainslabs) mod ids, restoring full Terrain Slabs support.

No other changes. Base (vanilla-slab) behavior is unaffected.

[0.3.0-beta.1] — Terrain Slabs Compatibility

Added

• Countered’s Terrain Slabs (terrainslabs) compatibility. Blocks, objects (lanterns, torches, chains), and vanilla slabs placed on Terrain Slabs surfaces lower to sit flush, forming continuous "combined slab" surfaces. The compatibility is optional and runtime-gated — Slabbed runs unchanged when Terrain Slabs is not installed.

Fixed

• Targeting overhaul. Blocks rendered at a visual offset are now selected by true nearest-hit from the player's eye, fixing the long-standing mistargeting where the crosshair and the selection outline disagreed on offset shapes.
• Lanterns / objects on a mixed slab (a vanilla slab capping a Terrain Slabs slab) now lower the full amount to sit flush instead of floating half a block above.
• Full blocks on a mixed slab no longer briefly lower and then pop back up after placement (a placement-anchor sync race).
• Vanilla slabs chain flush on combined slabs: a top slab capping a Terrain Slabs slab, and a vanilla slab stacked on a mixed slab, now sit flush instead of leaving a gap.
• See-through "window" holes on lowered blocks — a wrongly culled side face that exposed the void/sky through the block — are fixed.
• Smooshed Lanterns have been eliminated. In 0.2.0-beta.4, a bug caused lanterns underneath lowered blocks to be 'smooshed' upward into the block, clipping part of the lantern model. This was a side effect of expanding compatibility of chaining permissions (chains stacking all the way down) and has been resolved.

Known limitations

• Custom (Terrain Slabs) slabs do not yet lower when placed directly onto a vanilla slab.
• Deep (3+ high) combined-slab towers cap at a one-block visual offset to keep block targeting reliable.

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.

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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.

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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

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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

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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

Slabbed 0.2.0-beta.1-hotfix.3

Fixed

• Restored chain ceiling support under top slabs and double slabs
• Fixed slab offset eligibility so shared offset logic only applies in slab-aware cases
• Improved alignment between visual position and targeting (raycast / outline parity)
• Fixed duplicate carpet outline offset behavior

Notes

• This release also includes internal testing and validation improvements to make slab behavior more consistent and easier to debug going forward

Known Issues (Important)

• Rendering is not fully solved:
  Some blocks still have visual glitches (including face-culling issues, clipping, or missing faces) when placed on slab-supported surfaces.
  This is a broader limitation of how Minecraft handles partial-block rendering and is not fully fixable yet.

• Rails:
  Transitions between slab-height rails and normal rails can look awkward

• Targeting / placement feel:
  In some edge cases, placing blocks on slab-supported surfaces may feel slightly inconsistent

• Carpet / snow behavior:
  Still follows vanilla rules — placing a slab will replace them

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If something looks visually wrong but still functions correctly, that’s likely part of the current rendering limitation rather than a regression.

Slabbed — 0.2.0-beta.1-hotfix.2

🔧 Fixes

• Client Lag Resolved

  • Removed runaway emitQuads debug logging that caused severe client-side lag during placement and rendering.

• SBSF Stabilization

  • Improved stability for Slab-Block-Slab (SBSF) stacking.
  • Eliminated visible floating/gap behavior in common SBSF scenarios.

• Triad Integrity Verified

  • Confirmed model, outline, and raycast alignment for dy ≠ 0 cases.
  • No visual/interactions divergence introduced.

🧪 Verified

• No placement lag.
• No SBSF ghosting after movement, reload, or neighbor updates.
• Baseline (full-block lane) remains unchanged.

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If you experienced placement lag in previous builds, update to this version.

Limitations

• Certain multi-layer slab stacks can still produce visual or placement inconsistencies (e.g., ghost faces or unintended vertical offsets).

• Currently supported patterns:

  • SBS (Slab → Block → Slab)
  • SBBS, SBBBS, and deeper variants (any number of full blocks between slabs)

• Currently not supported:

  • SBSB (Slab → Block → Slab → Block)

In other words, once a slab has inherited an offset from the block below (the SBS case), placing a full block on top of that slab is not yet handled correctly and may result in floating or misaligned placement.

⚠️This version has severe bug causing freezing when placing objects. Please use v0.2.0-beta.1 while I work on a fix.

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0.2.0-beta.1-hotfix.1b

Fixes

• Fixed client crash caused by recursive outline offset (StackOverflow during interaction/placement).
• Restored correct visual alignment (model, outline, raycast) for carpets on bottom slabs.
• Resolved fence connection visual mismatch when placed across slabs and full blocks.
• Hardened null world/pos guards related to Create Fly bootstrap crash--Slabbed now supports Create Fly.
• Ghosting persists in slab → block → slab stacks. Slabs under blocks are stable; reintroducing slabs triggers ghost faces 👻.

Stability

• No feature changes.
• No gameplay scope expansion.
• Focused strictly on visual triad correctness and crash stability.

Slabbed — 0.2.0-beta.1 Changelog

👾 Beta update!

Fixed

• Resolved ghost block rendering involving carpet and snow layers.
  • Thin top-layer blocks (carpet, snow layers) are now explicitly excluded from visual Y-offset logic, preventing client-side floating or phantom geometry when slabs are involved.
  • Eliminates cases where carpet/snow appeared visually lifted or left empty space beneath after slab placement.

Behavior Clarification

• Carpet and snow layers follow vanilla replacement behavior:
  • Placing a slab in the same block space will replace carpet or snow.
  • Slabbed does not attempt to preserve or overlay these blocks, avoiding client/server desync and visual artifacts.

Notes

• This fix is structural and conservative:
  • No global solidity changes
  • No special casing beyond thin top-layer exclusion
  • Baseline (full-block) behavior remains identical to vanilla

This beta locks in the ghost-rendering fix and documents the intentional limitation around carpet/snow interactions.

Slabbed — 0.1.2-alpha

Added

• Expanded underside attachment support for top slabs:
  • Chains (including chain-to-chain stacking and chains connecting to lanterns)
  • Hanging signs
  • Hanging roots
  • Spore blossoms
  • Pointed dripstone
  • Trapdoors
  • Bells
  • Lightning rods
  • The vine thingies from the Nether
• Core placement + survival logic now treats the top face of top slabs as valid support for most hanging/underside decor.
• Strict visual alignment maintained for all supported blocks (no floating offsets).

Improved

• Stability of chained underside attachments (neighbor updates + reloads).
• Reduced recursion and update edge cases around underside placement.
• Debug tooling isolated and cleaned up for future investigation.

Fixed

• Resolved ghost block rendering caused by invalid client-side offsets in several cases.
• Prevented client-only geometry for most non-decorative blocks.
• Ongoing fix in progress for carpet-like blocks (snow layers / carpet), which may still ghost in certain slab-over scenarios.

Known Limitations

• Stairs are not supported as underside anchors (explicitly out of scope for now).
• Redstone power does not descend through slabs:
  • Power currently propagates upward only.
  • Powered rails placed on slabs require a same-level activator (lever/torch adjacent on slab height) to activate.
• Carpet and snow layer interactions are still being finalized.
• Chains under top slab do not yet attach to a block underneath.

Notes

• This is an alpha release focused on functional coverage and correctness, not full parity.
• Behavior is intentionally conservative: no global solidity lies, no implicit stair handling, no redstone hacks.

Slabbed — CHANGELOG

0.1.1-alpha (unreleased)

Added

• ⚡Sodium-compatible render offsets using FRAPI model wrapping + emit-time quad translation, so supported blocks visually sit flush on slab tops.
• Universal model-wrapping path (via the model loading plugin) so the offset mechanism applies broadly instead of being torch-only.

Fixed

• Visual alignment under Sodium: models now match the slab top surface (no “outline correct but model floating” mismatch).

Improved

• Redstone wire on slab tops: placement/visual connection behavior work better in slab step scenarios (power propagation is still not verified as correct in all cases).

Known issues (alpha)

• Redstone power propagation on/around slabs is still inconsistent in some setups; treat slab redstone as experimental.
• Ceiling-hanging support (chains / hanging signs under top slabs): needs in-game verification before calling it “done”.