Underlay
by Dooji
Players who want carpets, trapdoors or other thin blocks tucked under chests, beds and signs can use Underlay, which places an item into the free space beside a block face.
What it does
Underlay lets a player place a block into any open space that sits beside a block face, such as the gap under an upside-down stair or below a chest, bed or torch. A right click on a block face with a block in hand places it there. A second right click with another item replaces the overlay, and a left click removes it. The feature also works in Survival mode.
By default the mod accepts a short list of thin and flat blocks as overlays. Support for further blocks, such as grass, can be added or excluded through the configuration described on the project page. Underlay requires Fabric API on Fabric, and it runs on client and server, so both the server and every player need it. It is published for Fabric, Forge and NeoForge across 20 release versions, 1.12.2 – 26.3, and is open source under the GNU General Public License v3.0 only.
Key features
Overlay placement
A block is placed into free space beside a clicked block face, such as under a stair or beside a torch.
Quick replacement
A second right click with another item swaps the overlay for that item without breaking the first one.
Left-click removal
A left click on an overlay removes it from the block face.
Default overlay list
Thin and flat blocks such as floor coverings and small fixtures work as overlays out of the box.
Expandable block support
Other blocks, such as grass, can be added to the overlay list, and some default blocks can be excluded.
Gallery
Compatibility
Latest build for each game version and loader.
26.x5 of 5 versions with builds
1.21.x12 of 12 versions with builds
1.20.x2 of 2 versions with builds
1.12.x1 of 1 version with builds
This mod also publishes snapshot builds. Snapshots are not shown in the matrix.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Decorating furniture
Carpets can be placed under beds and chests to give rooms a layered look without extra building.
Building with stairs
Items can fill the gap under an upside-down stair, which keeps the underside of a build tidy.
Who it’s for: Builders and decorators in Survival or creative worlds, and server owners who want players to place extra blocks in tight spaces.
Questions
Does Underlay need Fabric API?
Does Underlay have to be installed on the server?
Can Underlay be used in Survival mode?
In the catalog
Underlay is one of 12,078 Decoration mods on ModsFinder, and one of 6,982 Decoration mods for Fabric. 8,071 mods support Minecraft 26.3.
More from Dooji
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What the author says
Underlay is a Minecraft mod that lets you place carpets (and anything else) under any block with space beneath it (e.g. chests, beds, signs, torches, etc.)! Just right click a block face with a block to place it, (for example, under an upside-down stair), and you're done! Right click again with another item to…
Official listing
- Modrinth page
- modrinth.com/mod/underlay
- Owner
- Dooji
- Published
- 2024-12-01
- Updated on Modrinth
- 2026-09-30
- Facts verified
- 2026-10-15