SplineCreate real-time 3D physics simulations without code
Give your designs weight, momentum, and life with Spline's real-time physics engine. Configure gravity, forces, and collisions visually to build simulations, toys, and product interactions that users can push, drag, and throw.
Physics-driven experiences make the most memorable interactive designs.
How physics simulations go from concept to interactive reality
Spline simplifies the entire pipeline for building physics simulations from the first bouncing cube to production-ready interactive scenes.
- 01
Ideate
Prototype your idea by dropping objects into a scene and enabling physics with a click. Experiment with gravity, mass, bounciness, and friction in real time, and remix community physics scenes to learn proven setups.
- 02
Design
Design the full interaction: combine rigid bodies, forces, and colliders with events like collisions, trigger areas, and drag-and-drop. Layer in materials, lighting, and sound actions so every impact and tumble feels satisfying.
- 03
Ship to Production
Ship your simulation as an interactive web embed or code export that runs smoothly across devices. Physics stays fully interactive in production, so visitors can play with your scene, not just watch it.
Remix Physics Simulations from the Community
Discover physics-ready templates to jumpstart your interactive, real-time simulation projects.
Questions, answered
Can I create 3D physics simulations for free?
Yes! Spline offers a free plan that includes the real-time physics engine, so you can experiment with gravity, collisions, and forces and publish playable simulations to the web. Perfect for interactive toys, product demos, and educational scenes.
How can I start building physics simulations?
Getting started is straightforward. Add objects to a scene, enable physics on them, and press play - they immediately fall, collide, and stack. From there, tune properties like mass and friction, or remix a physics template from the Spline Community.
What is Spline and how does its physics engine work?
Spline is a real-time 3D design tool with a built-in physics engine. You configure physical behavior visually - rigid and static bodies, colliders, gravity, and forces - and Spline simulates everything live in the editor and in your published scenes.
What kinds of physics interactions does Spline support?
Spline supports rigid body dynamics, collisions, gravity and custom forces, and physical interactions like dragging and throwing objects. Combined with collision events and trigger areas, you can make the simulation drive animations, sounds, state changes, and game logic.
Can users interact with my physics scenes on the web?
Yes - that's the magic. Published Spline scenes keep physics fully live, so visitors can grab, toss, and knock over objects right in the browser. It's an incredibly effective way to make landing pages and product showcases feel playful and real.
Do I need coding or simulation experience to use physics in Spline?
No. Physics in Spline is completely visual: toggle it on per object, adjust a few intuitive properties, and connect behaviors with events and actions. Developers can still go deeper with code exports when a project calls for it.
Bring Real Physics to Your Designs
Build interactive simulations with gravity, collisions, and forces that users can play with in the browser.