IBREALISTIC
by kanorto
Boats in Minecraft drive like real rally cars once IBRealistic is installed, with four-wheel vehicle dynamics replacing vanilla boat movement.
What it does
IBRealistic replaces the vanilla boat movement with a four-corner vehicle model. Each wheel tracks its own load, how far it slides sideways, and the forces pushing it across and along the road, while a Fiala/Brush tire curve handles saturation and a friction circle. Weight shifts between axles under braking, acceleration and cornering, and the drivetrain layout (RWD, FWD or AWD), differentials and aerodynamic downforce and drag shape how the car handles. Surfaces carry their own friction and cornering stiffness, and airborne physics cover jumps, grip loss and landing bumps.
The mod is client-side only, so servers run without it and players join without installing it. It is open source under the MIT License and needs Fabric API and OpenBoatUtils, which is an unofficial fork of the original project by o7moon. Files are published for Fabric 1.21.3 and 1.21.4, with 1.1.0 for 1.21.4 as the latest release, dated 2026-02-22. The project was first published on 2026-02-09.
Key features
Four-wheel tire model
Each wheel tracks load, slip and friction separately, using a nonlinear tire curve with progressive falloff.
Drivetrain and differentials
RWD, FWD and AWD layouts with configurable torque split, plus open, locked or limited-slip differentials per axle.
Surfaces and weather
Eighteen surface types each carry their own friction and cornering stiffness, and grip changes with weather.
Damage, telemetry and ghost racing
Mechanical wear builds up over a drive, telemetry is logged, and a ghost car lets players race their own fastest lap.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
Use cases
Rally driving on a boat
Players who want a demanding driving model can run stages with boats, using weight transfer and tire grip to control slides.
Time attacks against a ghost
Recorded laps can be replayed as a ghost, so a driver can measure each run against their previous fastest lap.
Who it’s for: Players who want demanding driving physics in Minecraft, and server owners who run boat races or rally events on their own infrastructure.
Questions
Does IBRealistic need to be installed on the server?
What does IBRealistic require?
Can the mod's physics be tuned?
In the catalog
IBREALISTIC is one of 3,932 Transportation mods on ModsFinder, and one of 2,390 Transportation mods for Fabric. 17,979 mods support Minecraft 1.21.4.
Similar mods
What the author says
IBRealistic is a client-side Fabric mod for OpenBoatUtils. It replaces Minecraft's boat movement with a professional-grade four-wheel vehicle dynamics simulation — complete with real tire physics, damage systems, telemetry, ghost racing, and full tournament infrastructure. IBRealistic makes boats behave like real…
Official listing
- Modrinth page
- modrinth.com/mod/ibrealistic
- Owner
- kanorto
- Published
- 2026-02-09
- Updated on Modrinth
- 2026-02-22
- Facts verified
- 2026-10-15