Horizon with mod input, ui, render and world (3)

A build of Horizon with four mod capabilities from Horizon's own roadmap, so a mod can be a whole feature rather than a HUD. It's what Orbital Laser runs on.

Capability	What a mod can do
input	claim an item's right-click (use-start, use-stop, ticks held), register keybinds (listed in Options → Controls → Key Binds under the mod's name), read the held item; new: poll-typed, the text typed and the keys pressed while its screen is open
ui	own a screen drawn from fills, quads, sprites, item icons and text, with clicks and Escape as events; it doesn't pause the game
render	a post-processing pass of its own, plain WGSL after the game's mod pass prelude (the world's colour and depth, the camera and 16 per-frame parameters), drawn before any shader pack, and shake(strength, seconds), a real camera shake
world	raycast up to 1024 blocks (across the distant terrain with LOD Distance on), run commands at operator level silently in one tick (single player and LAN hosts), play sounds; new: set-flying-speed, the player's creative flying speed (kept through respawns and game mode changes, vanilla's again when the mod stops)

New since orbital-mod-api-2:

• On Horizon's main as of 2026-10-25: its new renderer, which replaced shader-pack support with its own post-processing, and single player on an integrated server thread.
• A mod's post pass is plain WGSL now, after the game's prelude (crates/horizon-client/src/gfx/mod_post.wgsl on the branch), and the world's depth is kept for it. Passes written for orbital-mod-api-2's shader-pack stage format need porting: docs/mods.md has the details. Mods that don't use render load unchanged.
• Flying speed and typing for mods (above). New events are still pulled by the mod rather than called as hooks, so mods built before them load unchanged.
• Mods' commands run on the integrated server as the owner, without blocking the frame, and horizon-ctl command reaches a mod's commands; horizon-ctl type TEXT types into a mod's screen.

Install

1. Download horizon-orbital-linux-x86_64.tar.gz below and unpack it (Orbital Laser's play.sh looks in ~/horizon-orbital).
2. Prepare the resources once from your own Minecraft 26.3 (Java 25 and the 26.3 server jar, as Horizon's PLAY.txt explains):
   ./horizon-prepare --prepare --server-jar PATH/TO/server.jar, then ./horizon-prepare sounds.
   If you already have Horizon prepared, you can pass its resources instead (--resources …/.local/horizon-client/26.3).
3. Start it from your game folder (~/.local/share/horizon), since the game keeps saves, options and mods where it starts. README-ORBITAL.txt in the download has the command, and Orbital Laser's play.sh runs it for you.

Important

This is not an official Horizon release, and it contains nothing from Minecraft: you need your own copy of Minecraft Java Edition 26.3. It's built from mod-api-input-ui-render-world (commit 848a0686), which is upstream main as of 2026-10-25 plus these changes. Orbital Laser 0.5.1 needs this build (or newer).

Warning

Linux x86-64 only, and experimental. Tested on one Linux PC (Fedora, NVIDIA). Elsewhere, build the branch from source with mods on: cargo build --release -p horizon-client --features mods.

Assets

file	what
horizon-orbital-linux-x86_64.tar.gz	horizon-client, horizon-ctl, horizon-prepare, the licence and notices, and README-ORBITAL.txt
Source code (zip / tar.gz)	the branch's source

Horizon with mod input, ui, render and world (2)

A build of Horizon with four mod capabilities from Horizon's own roadmap, so a mod can be a whole feature rather than a HUD. It's what Orbital Laser runs on.

Capability	What a mod can do
input	claim an item's right-click (use-start, use-stop, ticks held), register keybinds (listed in Options → Controls → Key Binds under the mod's name), read the held item
ui	own a screen drawn from fills, quads, sprites, item icons and text, with clicks and Escape as events; it doesn't pause the game
render	a post-processing pass in the shader-pack stage format, with 16 per-frame parameters (frame.mod_params), drawn after any shader pack; new: shake(strength, seconds), a real camera shake (the view turns, so the world, the hand and post passes move together; scaled by Distortion Effects)
world	raycast up to 1024 blocks (new: past the loaded chunks across the distant terrain, with LOD Distance on), run commands at operator level silently in one tick (single player and LAN hosts), play sounds

Mods built for Horizon's API 0.1 still load unchanged. New events are pulled by the mod (input.poll) rather than called as new hooks, and the WIT package stays horizon:mods@0.1.0. The details are in docs/mods.md on the branch.

Also new on the branch since orbital-mod-api-1:

• horizon-ctl record PATH [FPS] / record stop: the finished frames, post passes and HUD included, streamed to a video through ffmpeg (NVENC when it's there).
• Block-break sounds and particles reach only 64 blocks, as vanilla's server sends them, and a few sound channels stay free for sounds played to the player, so a crater's worth of breaking can't silence them.
• /fill skips blocks that are already the target and caches its filter per state; timing spans for mod ticks and commands (HORIZON_SPIKES).
• Settings rebuilt by horizon-ctl options-set no longer drop the enabled mods.

Install

1. Download horizon-orbital-linux-x86_64.tar.gz below and unpack it (Orbital Laser's play.sh looks in ~/horizon-orbital).
2. Prepare the resources once from your own Minecraft 26.3 (Java 25 and the 26.3 server jar, as Horizon's PLAY.txt explains):
   ./horizon-prepare --prepare --server-jar PATH/TO/server.jar, then ./horizon-prepare sounds.
   If you already have Horizon prepared, you can pass its resources instead (--resources …/.local/horizon-client/26.3).
3. Start it from your game folder (~/.local/share/horizon), since the game keeps saves, options and mods where it starts. README-ORBITAL.txt in the download has the command, and Orbital Laser's play.sh runs it for you.

Important

This is not an official Horizon release, and it contains nothing from Minecraft: you need your own copy of Minecraft Java Edition 26.3. It's built from mod-api-input-ui-render-world, which is upstream main as of 2026-10-22 plus these changes. Orbital Laser 0.5.0 needs this build (or newer).

Warning

Linux x86-64 only, and experimental. Tested on one Linux PC (Fedora, NVIDIA). Elsewhere, build the branch from source: cargo build --release -p horizon-client.

Assets

file	what
horizon-orbital-linux-x86_64.tar.gz	horizon-client, horizon-ctl, horizon-prepare, the licence and notices, and README-ORBITAL.txt
Source code (zip / tar.gz)	the branch's source

Horizon with mod input, ui, render and world

A build of Horizon with four mod capabilities from Horizon's own roadmap, so a mod can be a whole feature rather than a HUD. It's what Orbital Laser runs on.

Capability	What a mod can do
input	claim an item's right-click (use-start, use-stop, ticks held), register keybinds (listed in Options → Controls → Key Binds under the mod's name), read the held item
ui	own a screen drawn from fills, quads, sprites, item icons and text, with clicks and Escape as events; it doesn't pause the game
render	a post-processing pass in the shader-pack stage format, with 16 per-frame parameters (frame.mod_params), drawn after any shader pack
world	raycast up to 256 blocks, run commands at operator level silently in one tick (single player and LAN hosts), play sounds

Mods built for Horizon's API 0.1 still load unchanged. New events are pulled by the mod (input.poll) rather than called as new hooks, and the WIT package stays horizon:mods@0.1.0. The details are in docs/mods.md on the branch.

Also fixed on the branch: settings rebuilt by horizon-ctl options-set no longer drop the enabled mods (which saved an empty horizon-mods.txt).

Install

1. Download horizon-orbital-linux-x86_64.tar.gz below and unpack it (Orbital Laser's play.sh looks in ~/horizon-orbital).
2. Prepare the resources once from your own Minecraft 26.3 (Java 25 and the 26.3 server jar, as Horizon's PLAY.txt explains):
   ./horizon-prepare --prepare --server-jar PATH/TO/server.jar, then ./horizon-prepare sounds.
   If you already have Horizon prepared, you can pass its resources instead (--resources …/.local/horizon-client/26.3).
3. Start it from your game folder (~/.local/share/horizon), since the game keeps saves, options and mods where it starts. README-ORBITAL.txt in the download has the command, and Orbital Laser's play.sh runs it for you.

Important

This is not an official Horizon release, and it contains nothing from Minecraft: you need your own copy of Minecraft Java Edition 26.3. It's built from mod-api-input-ui-render-world, which is upstream main as of 2026-10-22 plus these changes.

Warning

Linux x86-64 only, and experimental. Tested on one Linux PC (Fedora, NVIDIA). Elsewhere, build the branch from source: cargo build --release -p horizon-client.

Assets

file	what
horizon-orbital-linux-x86_64.tar.gz	horizon-client, horizon-ctl, horizon-prepare, the licence and notices, and README-ORBITAL.txt
Source code (zip / tar.gz)	the branch's source