Fusion3D3D Engine3D EditorGames SDKFusion Software

One engine for interactive 3D, simulation and games.

FUSION 3D ENGINE · FUSION 3D EDITORFusion 3D is Fusion's 3D family: Fusion 3D Engine, the core engine that renders 3D and 2D for Fusion's applications and for Fusion OS, and Fusion 3D Editor, the visual tool for building what it renders.
A Ferris wheel between striped circus tents at the entrance of an amusement park by the sea, rendered by Fusion 3D Engine
Fusion World 2, the engine's demo, rendered live by Fusion 3D Engine.

Fusion World 2, rendered live.

Fusion World 2 is the engine's demo: a coastal city with an amusement park, a roller coaster and a monorail you can ride, people, traffic, an ocean with surf and a full day and night, all running in Fusion 3D Engine.
A roller coaster train climbing over an amusement park with circus tents
The roller coaster over the park.
The view from a roller coaster seat as the track drops past the park
Riding it from the front seat.
A roller coaster loop beside the coast, with the city beyond
The loop, with the city and coast beyond.
A carousel and circus tents on the park plaza
The carousel on the park plaza.
Looking out from a monorail car at the station
Boarding the monorail.
The sun setting over the ocean at the edge of the city
Sunset over the ocean.

Fusion 3D Engine

Rendering, scenes, physics, characters, sensing, events, audio, networking and deterministic outcomes in one runtime, controlled from Solerra through tested contracts. It is the engine for all 3D rendering in Fusion's applications and in Fusion OS.

Scenes and objects

Create worlds, objects, hierarchies, transforms, models, cameras, lights, surfaces and materials with stable identities and ownership.

Rendering and environment

Control level of detail, skyboxes, global light, shadows, terrain, particles and cameras. It renders through OpenGL on Windows and Fusion OS today, with Direct3D for Windows in development.

Physics and collision

Configure bodies, materials, mass, friction, constraints, triggers, contact events and surface conditions.

Characters and movement

Drive characters, animation, navigation, crowds, vehicles and steering.

Events, sensing and outcomes

Subscribe objects to collision, sound, motion, proximity and visibility events, then choose actions through explicit outcome rules instead of polling scripts.

Replay and networking

Run fixed ticks, record inputs and outcomes, replay them deterministically and replicate state across nodes with explicit ownership.

Built for more than games.

The same engine serves games, construction visualization, digital twins, training, engineering analysis, live experiences and robotics without forcing every object into game terms.

Deterministic by design

Simulation, animation, sensing and outcomes advance on explicit ticks, so behavior can be reproduced and checked.

Explainable decisions

Record the events, rules and fallback behind each action, so you can see why a guard responded or a vehicle braked.

Embedded in applications

Applications draw through the engine in their own windows or offscreen, which is how Fusion 3D Editor's views work today.

Build games with the Games SDK.

Fusion's Games SDK is the Solerra Game and Simulation API: 342 tested operations across 58 domains, from characters, physics and cameras to events, agents and outcomes, on a deterministic fixed-step clock. Fusion 3D Engine and Fusion 3D Editor are built around the same calls.

Worlds and characters

Create a world with a tick rate and seed, spawn characters, attach cameras and drive them from Solerra.

Events and outcomes

Subscribe to collisions and other events, then decide what happens through outcome rules you can inspect.

Deterministic play

Fixed-step time and ordered inputs make every run reproducible, for replays, testing and networked play.
Read the Game API reference

Fusion 3D Editor

The visual authoring tool for Fusion 3D Engine. Build scenes, assets, animation, lighting, materials and behaviors visually, then control the same objects through Solerra. Its Scene View and Materials preview draw through the engine.
Fusion 3D Editor with a textured park bench in the live Scene View, transform handles, scene hierarchy, asset browser and Inspector
The current Fusion 3D Editor workspace: imported assets, live Scene View and transform controls.

A 3D asset workspace

Organize meshes, materials, scenes, captures and revisions around stable content identities.

Image to 3D

Turn images, masks, depth maps and calibrated stereo into geometry you can inspect.

Revision-safe editing

Keep earlier revisions instead of silently replacing approved work.

Game and simulation behavior

Add characters, vehicles, physics, collisions, sensing and input through the same API the engine runs.

Inside Fusion.

Fusion OS

Fusion 3D Engine is the 3D engine built into Fusion OS, shared by the applications that run on it.Fusion OS →

Fusion CAD

Fusion CAD's 3D view is moving onto Fusion 3D Engine.fusioncad.cloud →

Solerra

Script scenes, behavior and outcomes in Solerra, Fusion's language.solerra.cloud →

Fusion 3D is in active development.

Follow Fusion 3D Engine and Fusion 3D Editor, and the rest of the Fusion portfolio, on fusionsoftware.cloud.Fusion 3D Engine on fusionsoftware.cloud