LinVerticalSlab
LinVerticalSlab lets players place half-height blocks upright against a wall, adding vertical slab variants to the game on NeoForge.
What it does
Placing a half block against a side face with the right mouse button stands it upright, and holding Shift while placing it keeps the normal horizontal orientation. The mod generates its vertical models from a resource pack, so the generated resource pack has to be enabled manually after the first time a save is entered. Once it is enabled, pressing F3+T reloads the resource files so the changes take effect.
Vertical half blocks are built on the original SlabBlock class, which means the mod is theoretically compatible with other mods that add half blocks, provided those blocks are registered in a compatible way. The mod runs on the client and the server, so both sides need it. It is published for NeoForge only, for 1.21.1 – 1.21.9, and its latest file is 0.0.16 for 1.21.9. The code is released under the Creative Commons Attribution Share Alike 4.0 license, so it is not open source.
Key features
Upright half blocks
A half block placed against a side face stands upright instead of lying flat, giving a vertical slab shape.
Horizontal placement with Shift
Holding Shift while placing a block keeps the usual horizontal orientation, so both forms can be used in the same build.
Generated resource pack
Vertical models are produced by a generated resource pack that must be enabled manually after the first time a save is entered.
Collision volume fix
Collision shapes for the vertical models are generated in the resource files; reloading with F3+T applies changes without restarting.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Vertical wall trim
Builders can use upright half blocks to add narrow vertical bands along walls and corners.
Mixed slab layouts
Horizontal and upright placements can be mixed in one build, choosing the orientation per block with Shift.
Who it’s for: Builders who want half-height blocks in an upright position, and server owners who need the mod on both sides, since clients and the server must both run it.
Questions
Does LinVerticalSlab need to be installed on the server?
Why do the vertical models not appear after installing?
Which game versions does LinVerticalSlab support?
More from Violet-Molder
What the author says
一个简单的小mod，添加了竖半砖，但并没有添加新的方块，而是为SlabBlock方块添加了竖着放置的逻辑和模型。当用半砖右键方块侧面放置的时候半砖会竖起来，按下shift可以正常的横着放置。 模型的处理方式是会生成一个材质包，因此第一次进入游戏存档后需要手动启用材质包。理论上兼容其他mod的半砖，但具体要看那些半砖是否是注册为原版的SlabBlock类。
Official listing
- Modrinth page
- modrinth.com/mod/linverticalslab
- Owner
- Violet-Molder
- Published
- 2025-10-06
- Updated on Modrinth
- 2026-08-04
- Facts verified
- 2026-10-15