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Creating a Marble Machine Using Geometry Nodes in Blender

Blender is a versatile 3D creation software that allows users to bring their imagination to life. With its expansive set of tools, Blender enables creators to build intricate 3D models, characters, and animations. One of the latest features in Blender is Geometry Nodes, which allows users to manipulate and generate geometry using a node-based system. In this tutorial, we will explore how to create a marble machine using Geometry Nodes in Blender.

Getting Started with Geometry Nodes

Before we dive into creating the marble machine, let's take a quick look at Geometry Nodes in Blender. Geometry Nodes is a powerful tool that allows for procedural modeling, allowing users to create complex geometry and effects by linking a series of nodes together. These nodes can be used to control the generation, transformation, and manipulation of geometry within Blender.

To get started with Geometry Nodes, make sure you have the latest version of Blender installed. Once you have Blender open, you can access Geometry Nodes by switching to the "Geometry Nodes" workspace. From there, you can start creating and connecting nodes to generate your desired geometry.

Creating the Marble Machine

Now that we have a basic understanding of Geometry Nodes, let's jump into creating a marble machine. A marble machine is a mechanical device that uses gravity to propel marbles through a series of tracks and obstacles, creating an entertaining visual display. We will be using Geometry Nodes to create the components of the marble machine and set up the paths for the marbles to travel.

Creating the Base Structure

First, we'll start by creating the base structure of the marble machine. We can use simple primitive shapes such as cubes, cylinders, and spheres to build the framework. We can then manipulate and duplicate these shapes using Geometry Nodes to generate the components of the marble machine, such as ramps, tracks, and funnels.

With Geometry Nodes, we can easily duplicate and translate objects to create a series of interconnected components that form the structure of the marble machine. We can also use transformation nodes to rotate and scale the components to achieve the desired layout.

Generating the Marble Paths

Next, we'll focus on creating the paths for the marbles to travel. This can be done by using Geometry Nodes to create a series of curved tracks and obstacles for the marbles to navigate. We can utilize curve primitives and shape nodes to define the paths, and then use Boolean operations to cut out the track geometry from the base structure.

Additionally, we can use additional nodes to add variation to the paths, such as randomizing the placement of obstacles or adding twists and turns to the track. This will create an engaging and dynamic marble machine that keeps the viewer engaged as they watch the marbles traverse the various paths.

Adding Physics and Animation

To bring the marble machine to life, we can set up physics simulations and animations using Blender's built-in tools. By applying physics properties to the marbles and components of the marble machine, we can simulate realistic interactions and movements as the marbles roll through the tracks.

We can also animate certain components of the marble machine, such as rotating gears or moving platforms, to add further visual interest to the scene. This can be achieved by using keyframe animation and driven properties within Blender.

Fine-tuning and Refinement

Once the basic components of the marble machine are in place, we can fine-tune and refine the machine to ensure that it operates smoothly and looks visually appealing. This can involve adjusting the positioning of components, refining the shapes of the tracks, and adding details such as textures and materials to enhance the overall visual impact of the marble machine.


In this tutorial, we've explored how to create a marble machine using Geometry Nodes in Blender. By leveraging the power of Geometry Nodes, we were able to generate complex geometry, create intricate paths for the marbles, and bring the machine to life through physics simulations and animations. With its intuitive node-based system, Geometry Nodes opens up a world of possibilities for creating dynamic and interactive 3D scenes within Blender. So, whether you're interested in building a marble machine or exploring other creative projects, Geometry Nodes is a valuable tool to add to your Blender workflow.

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