Sable - Make it compatible
New in 1.3.0: The Immersive Portals patch moved here from Immersive Portals - Make it compatible, vehicles driving through portals included. New Sable x Voxy patch: under a shaderpack, vehicles are hidden behind Voxy's distant terrain.
Compatibility patches for Sable on NeoForge 1.21.1: Iris shaderpacks, Voxy's distant terrain and Immersive Portals. Each patch turns on only when the mods it bridges are installed. The portal patch is based on ImmersivePortalSableBridge by rebbyIf and Bunting_chj.

Shaderpacks
- Under an Iris shaderpack, faces of a vehicle could render solid black and flicker while you built on it. Now it is lit like the terrain around it.
- With Voxy, a vehicle beyond a distant LOD mountain showed through it. Now it is hidden behind the distant terrain, with Voxy through Roxy or the Voxy Forged port.
- Both have an option under Mods > Make it Compatible: Sable > Config. Without a shaderpack nothing changes.
Immersive Portals
- Drive a vehicle at a portal and it goes through, with its momentum and everyone on deck, into another dimension too. It crosses when its pivot passes the portal, so aim the middle of the hull at the opening.
- A vehicle halfway through is in both places at once. You can walk on both halves, place and break blocks on them, and each is lit by its own world.
- A portal built and lit on a vehicle travels with it. Create Aeronautics balloons keep their lift across a portal, and Simulated's physics staff works through one.
- Portal collision and vehicle collision both work, and vehicles stay loaded and visible through portals. Mirror, scaling and gravity-changing portals do not cross.

LittleTiles
- LittleTiles supports Sable by itself since 1.6.0-pre223. Sable 2.0.3 still flags it as incompatible; this jar lifts the flag for the running game only and writes nothing to your config.
Requirements
Minecraft 1.21.1, Java 21, NeoForge 21.1 and Sable 2.0 or newer, on the client and the server. Iris is needed for the shaderpack fixes, Voxy for the distant-terrain one, Immersive Portals 6.0.7 or later (the NeoForge build) for the portal patch. With an Immersive Portals - Make it compatible older than 1.3.0 installed, the portal patch here steps aside and asks for an update.

Related mods

NeoForge 1.21.1, on the client and the server. Free to use in modpacks.