Vertical Slabs Everywhere

Adds a vertical slab for every slab in your pack — wood, stone, brick, deepslate, any material, any mod.

No config, no compatibility patches, no manual lists. Install it and every slab your pack registers gains a matching vertical variant.

The original Vertical Slabs Compat stopped at 1.20.1. Every Compat covers wood types only. This covers everything with a slab, on 1.21.1.

Requires

Moonlight Lib 1.21.1-3.1.1+
Quark 4.1+
Zeta 1.1+

All three are required. The mod will not launch without them.

What it does

Behaves exactly like Quark's vertical slabs. Placement, rotation, doubling, waterlogging, and collision are Quark's own — because the block extends it.
Textures always resolve. Models are generated at runtime and inherit from the parent slab, so they bake correctly — even for slabs other mods generate dynamically (Every Compat, StoneZone).
Full recipe and loot support. Double slabs drop two, 3:3 crafting both directions, optional 1:1 stonecutter recipes, mining-tool tags copied from the parent.
Correct tags and names. Tagged under quark:vertical_slab, c:vertical_slabs, and c:slabs. Names derive from the parent — "Vertical Oak Slab" — in every language it provides.

Fills gaps only

If another mod already provides a vertical slab for a material — Quark, Every Compat's wood types, StoneZone's stone types, or anything ending in _vertical_slab — this mod skips it.

No duplicate blocks. No cluttered creative tabs.

Works with the original Vertical Slabs Compat

Blocks use the same id pattern as MehVahdJukaar's original, so 1.20.1 worlds and structure files resolve seamlessly:

v_slab_compat:<parent_namespace>/<name>_vertical_slab

This is an independent clean-room implementation — none of the original's code or assets were used, and it is not affiliated with or endorsed by MehVahdJukaar. If the official v_slab_compat is ever installed alongside it, this mod registers nothing, so the two cannot conflict.

Limitation: worlds that ran the original without Quark used v_slab_compat:<vanilla>_vertical_slab ids. Quark is required here and supplies vanilla vertical slabs under its own ids, so those are not recreated.

Configuration

config/vertical_slabs_everywhere-common.toml

Option	Default	Effect
`skipped_mods`	`[]`	Namespaces to skip entirely
`skipped_blocks`	`["amendments:carpet_slab"]`	Block ids to skip
`force_generate`	`[]`	Block ids to generate even if the duplicate check would skip them
`max_registrations`	`-1`	Cap on generated slabs; `-1` = unlimited
`log_registered`	`false`	Log every generated slab (useful for building skip lists)
`emit_stonecutter_recipes`	`true`	1:1 stonecutter recipes

Edits apply on next launch.

Modpacks

Free to use in any modpack, public or private. No need to ask.

Issues and source

https://github.com/jim7061/vertical-slabs-everywhere

Missing or broken slab? Open an issue with the block id.

License

MIT. Quark, Zeta, and Moonlight Lib are separate dependencies under their own licenses; nothing from them is bundled here.

Credits

MehVahdJukaar — Moonlight Lib, and the original Vertical Slabs Compat.
Vazkii's Mods — Quark and Zeta.

Built for the upcoming 1.21 update to Luminal. Fully standalone — no dependency on that pack.