Sand Fix
by SworderExert
Sand Fix changes how sand and gravel variants react to block updates, so they no longer float in mid-air once the block below them is gone.
What it does
Falling sand and gravel blocks normally drop when nothing supports them, but some generated terrain leaves them hanging over empty space. Sand Fix makes the sand and gravel variants respond to block updates from the sides and from above, so they fall as expected when support disappears. The mod is aimed at world generation, where a few traps of loose sand or gravel can open a chasm under a player walking through a desert.
Other blocks that fall, such as concrete powder and anvils, are left unfixed, which avoids breaking some advanced redstone contraptions that depend on the default behaviour. Mods that add their own falling blocks can opt in through block tags: a block that carries both tags is handled by the sand fix tag, so the sand fix takes priority over the name.
The mod is Fabric only and is published for six game versions, 1.21 – 1.21.5, with 1.0.0 for 1.21.5 as the latest file. Sand Fix is server-side only, so players join without installing it, and it is released under a custom license and is not open source.
Key features
Mid-air sand and gravel
Sand and gravel variants that generate without blocks below them fall instead of staying suspended.
Block update reaction
Sand and gravel variants react to updates coming from the sides and above, not only from below.
Default falling behaviour kept
Other falling blocks such as concrete powder and anvils keep their vanilla handling, so redstone builds are not changed.
Block tag opt-in
Mods can add their own falling blocks to the sand fix through block tags, with the sand fix tag taking priority.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Desert exploration
Players crossing desert biomes are less likely to meet a sudden drop caused by unsupported sand.
Who it’s for: Players on survival or adventure servers who run into floating sand or gravel, and mod developers who want their falling blocks to follow the same rule.
How it compares
Gravel to Sand is a Fabric option for 1.21.10 – 1.21.11 that is server-side only, under the Creative Commons Attribution 4.0 license and not open source. Sand and gravel are forbidden to fall is a Fabric mod for 1.20.1 that runs on both client and server under the MIT License, and it is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Sand Fix | Fabric | 1.21 – 1.21.5 | Server-side only | 2025-03-28 |
| Gravel to Sand | Fabric | 1.21.10 – 1.21.11 | Server-side only | 2026-03-07 |
| Sand and gravel are forbidden to fall | Fabric | 1.20.1 | Client and server | 2025-03-23 |
Questions
Does Sand Fix need to be installed on the client?
Which loader does Sand Fix use?
Can another mod add its own blocks to the fix?
More from SworderExert
What the author says
Picture this: you are wandering through a desert. Your hunger bar is almost empty but you have some wheat in your inventory, so you place down your crafting table to prepare yourself some delicious bread... and then BAM! A huge chasm opens below your feet: it's Satan himself dragging you straight to Hell! You fall in…
Official listing
- Modrinth page
- modrinth.com/mod/sand-fix
- Owner
- SworderExert
- Published
- 2025-03-28
- Updated on Modrinth
- 2025-03-28
- Facts verified
- 2026-10-15