# Tracked Billboard In this section, you'll discover how to use the Tracked Billboard pipeline with Reality 5.4. For our demonstration, we will employ [TRAXIS Talent Tracking](https://docs.traxis.ai/docs/v/talent-tracking-2.0/) as a provider. ### What Is Tracked Billboard? Tracked Billboard enables you to seamlessly integrate your keyed talent into the Reality 5.4 scene, achieving a photorealistic appearance. Furthermore, it can be utilized in a variety of creative scenarios, including Teleportation and Fly Cam. ### Process

* Login to Reality Hub. * Activate the [Launcher](https://zerodensitydocumentation.gitbook.io/docs/reality-5.4/reality-5.4/user-guide/launcher) module and launch your project.

Dragging & Dropping Engine into Nodegraph Canvas

* Go to the **Engines** section, drag and drop the **`UE5`** process into Nodegraph canvas.

* Go to the [Node Details Panel](https://zerodensitydocumentation.gitbook.io/docs/reality-5.4/reality-5.4/user-guide/nodegraph-actions/nodegraph/node-details-panel). * Click on the **Spawn Reality Camera** and **Spawn Reality Tracked Billboard** [function](https://zerodensitydocumentation.gitbook.io/docs/reality-5.4/reality-5.4/user-guide/nodegraph-actions/nodegraph/node-details-panel/function) buttons.

As soon as you click on abovementioned function buttons, following changes occurs as illustrated above: 1. Reality Actors folder has been created. 2. New Properties has been added.

* Create **`AJAIn`** and **`AJAOut`** nodes, then designate your reference by right-clicking on each node. In our example, we have selected **`SingleLink 1`** for **`AJAIn`** and **`SingleLink 4`** for **`AJAOut`**. * Establish your corresponding camera tracking node. In our example, we utilized **`Xync`**. * Connect the **`SingleLink 1`** output pin of the **`AJAIn`** node to the **`Sync`** input pin to the **`Xync`** node. ### Breaking Track Breaking Track is a procedure for extracting specific output from a **`Track`** node. For instance, you might prefer to use only the **`Location`** data from your talent tracking software/hardware or on a focus property of **`Lens Distortion`** data for your pipeline. This approach also allows you to conduct advanced compositing operations. Now: * Create a **`Break Track`** node. * Connect the **`Track`** output of the **`Xync`** node to the **`Input`** input pin of the **`Break Track`** node. ### Cyclorama Connections Now that we have AJA nodes for video I/O, talent tracking, camera tracking, and Reality 5.2 nodes, as illustrated in the previous image, it's time to incorporate Cyclorama. * Add a **`Cyclorama`** node to the canvas. #### Distorting and Undistorting Most camera lenses exhibit some level of optical distortion, and as a result, you often need to perform undistortion and then distortion operations on your video source to address this issue. For instance, when dealing with the image from your studio and the 3D Cyclorama mesh you've created inside Reality 5.2, they may not align perfectly in terms of lens distortion. To ensure proper alignment between the Cyclorama and camera image, it's essential to employ the undistortion process. * Create two **`Distort`** nodes and one **`Undistort`** node.

* Go to the **Properties** section of each node you created. * Right-click the **`Distortion`** property for each node and select "**Show as Input**".

* Connect the **`Lens Distortion`** output of the **`Break Track`** node to the **`Distortion`** input pin of the **`Distort`** and **`Undistort`** nodes. * Connect the **`SingleLink 1`** output pin of the **`AJAIn`** node to the **`In`** input pin to the **`Undistort`** node. * Connect the **`AJAIn`** node's **`SingleLink 1`** output to **`Track`** input of the **`Cyclorama`** node. * Connect the **`Undistort`** node's **`Out`** output pin to **`Cyclorama`** node's **`Video`** input. * Connect the **`Cyclorama`** node's **`Render`** output to first **`Distort`** node's **`In`** input pin. * Connect the **`Cyclorama`** node's **`Mask`** output pin to the second **`Distort`** node's **`In`** input pin. ### Adding RealityKeyer Tracked Billboard pipeline requires keyed image of your talent; therefore, you have to use Reality Keyer.

* Create a **`RealityKeyer`** node. * Connect the **`Out`** output pin of the first **`Distort`** node to the **`Clean Plate`** input of the **`RealityKeyer`** node. * Connect the **`Out`** output pin of the second **`Distort`** node to the **`Clean Plate Mask`** the input of the **`RealityKeyer`** node. Connect the **`SingleLink 1`** output pin to the **`Input`** input pin of the **`RealityKeyer`** node. * Create a second **`Undistort`** node, right-click on its **`Distortion`** property and select "**Show as Input**". * Connect the **`Output`** output pin of the **`RealityKeyer`** node to the **`In`** input of the second **`Undistort`** node. ### Talent Location In order to place your talent inside the Reality 5.4 scene, you have to provide talent location data via a tracking system. In our example we utilized TRAXIS Talent Tracker.

* Create a corresponding talent tracking data node. In our example we use **`FreeD`** node. * Add the second **`Break Track`** node. * Create a **`Cast vec3 to vec3d`** node. * Connect the **`Location`** output pin of the second **`Break Track`** node to **`vec3`** input pin of the **`Cast vec3 to vec3d`** node. ### Engine Connections

* Connect the **`vec3d`** output pin of the **`Cast vec3 to vec3d`** node to **`UE5`** node's **`Reality Tracked Billboard Talent Location`** input pin. * Connect the second **`Undistort`** node's **`Out`** output pin to **`Reality Track Billboard Video`** input of the **`UE5`** node. * Connect the **`Xync`** node's **`Track`** output pin to the **`Reality Camera Track`** input pin of the **`UE5`** node. * Create a **`Composite Passes`** node. * Connect **`UE5`** node's **`Reality Camera Scene`** output pin to **`Composite Passes`** node's **`Render`** input. * Connect the **`Xync`** node's **`Track`** output to Track input of the Composite Passes node. * Connect the **`Output`** output pin of the **`RealityKeyer`** to the **`Video`** input of the **`Composite Passes`** node. * Connect the **`Output`** pin of the **`Composite Passes`** node to **`SingleLink 4`** input pin of the **`AJAOut`** node.