Northstar Sable Iris Horizon Bridge

A compatibility bridge for Northstar, Iris, Complementary Shaders, Distant Horizons, Sodium, and Sable.

Northstar Sable Iris Horizon Bridge makes planetary exploration look and behave as one connected experience. It fixes shader conflicts with Northstar skies, gives Distant Horizons a clean atmospheric exit, adds integrated configuration pages, and lets compatible Sable structures travel through Northstar's native planet-transfer boundaries.

Northstar is required. Other integrations activate only when their matching mod is installed.

Iris and Shader Compatibility

Northstar uses its own sky layers for planets, stars, clouds, masks, and space effects. Shader packs can hide these layers, treat them as a Sun or Moon, or render them with the wrong transparency.

This bridge adds Iris-aware Northstar rendering, with dedicated support for Complementary Shaders on Iris 1.8.x.

• Restores Northstar planet masks and custom sky layers.
• Keeps Northstar stars visible in dimensions and times where Northstar expects them.
• Prevents large planet textures and cloud layers from being mistaken for celestial bodies.
• Respects Northstar's dimension-specific Sun and Moon rules.
• Preserves clean black space backgrounds where appropriate.
• Stops shader volumetric clouds, cloud shadows, fog, and light effects from appearing in Northstar no-cloud space dimensions.
• Applies Northstar's intended atmospheric behaviour to Mars and Venus.
• Includes shader-side handling for Venus acid rain.

BSL can benefit from the Iris-side sky compatibility, while Complementary receives the dedicated shader-source compatibility path.

Distant Horizons Atmospheric Transition

Distant Horizons is useful near a planet's surface, but LOD terrain should not remain visible in open space.

The bridge fades Distant Horizons out as the player rises through the atmosphere instead of leaving an abrupt cutoff.

• Default fade begins at Y=500.
• Default fade distance is 64 blocks, ending at Y=564.
• Both values can be changed in the configuration.
• Prevents visual remnants when moving into high altitude.
• Protects Minecraft's vanilla cloud option from being permanently switched off by Distant Horizons.

Sable Structure Transfer

With Sable installed on the server, physical structures can cross Northstar's native transfer boundaries together with their passengers.

• A player standing on a Sable structure transfers together with that structure.
• Other entities on the structure transfer with it.
• An unattended Sable structure can transfer by itself when it crosses the Northstar transfer line.
• Structure detection uses Sable's own physical structure and standing-entity logic.
• Server transfer settings are synchronised to connected clients when the server has the bridge installed.

Planet-Aware Sable Weather Physics

Lightweight Sable structures can react to Northstar's Martian weather.

• Mars dust storms can push light physical structures.
• Movement is mass-aware and configurable.
• Motion is reduced when a structure travels across or against the wind.
• Players standing on a moving structure can follow its movement more naturally.
• Venus is not treated as a generic wind-force dimension.

Configuration Where You Expect It

The bridge groups related compatibility patches into understandable settings instead of exposing a confusing list of individual mixins.

• Client rendering compatibility and server gameplay patches are separated.
• Optional features disable themselves when their required mod is missing.
• Failed compatibility checks can show an error indicator and explanation.
• Shader-related changes can reload the active Iris shader pack when needed.
• When Sodium is installed, settings are available in its configuration screen.
• Settings can also be opened from the NeoForge Mods screen through the embedded configuration page.

Dependencies

Mod	Required?	Purpose
Northstar	Yes	Planet, orbit, sky, atmosphere, and transfer integration
Iris	Optional	Iris-compatible sky rendering
Complementary Shaders	Optional	Dedicated shader compatibility
Distant Horizons	Optional	High-altitude LOD fade
Sable	Optional	Structure transfer and Mars weather physics
Sodium	Optional	Integrated Sodium configuration page

Recommended Setup

For the full experience, use:

• Minecraft 1.21.1
• NeoForge
• Northstar 0.6.4+1.21.1
• Iris 1.8.x
• Complementary Shaders
• Distant Horizons
• Sable
• Sodium

Notes

• This is a compatibility add-on, not a standalone planet mod.
• Some shader-related settings require an Iris shader reload or a game restart.
• Install the bridge on the server to use Sable structure transfer and Sable weather physics.
• Client-side rendering compatibility can be used independently.

Not Affiliated

Northstar Sable Iris Horizon Bridge is an independent compatibility add-on. It is not affiliated with Northstar, Sable, Iris, Sodium, Distant Horizons, Complementary Shaders, or BSL Shaders.