About Visualization with Twinmotion

Twinmotion is a real-time visualization tool that enables you to produce high-quality images, panoramas, standard or 360° VR videos, and interactive presentations from design data. The changes you make in Twinmotion update in real time.

Your Revit model can be sent to Twinmotion using the Datasmith Exporter for Revit commands, included with Revit 2024. The design and visualization process can then be continued in Twinmotion. As the Revit model progresses, changes can be synchronized back into Twinmotion to update the design with the latest Revit changes.

Installation

If you don't have another version of Twinmotion installed:

Make sure you have the latest Revit update installed. You can download Autodesk Revit 2024 updates from your Autodesk Accounts, Products, and Services page or download and install automatically from the Autodesk Desktop Application.
Install the latest version of Twinmotion for Revit, which can be accessed from your Autodesk Accounts, Products, and Services page. Locate Twinmotion for Revit from your list of products, which will provide a link to access and download the installer from the Epic Games site.

Note: If you try to use the Twinmotion commands without first installing Twinmotion for Revit, you will be prompted to install Twinmotion. The Twinmotion is not installed dialog also includes the same link to your Autodesk Accounts, Products, and Services page.

If you already have another version of Twinmotion installed:

Make sure you have the latest Revit update installed. You can download Autodesk Revit 2024 updates from your Autodesk Accounts, Products, and Services page or download and install automatically from the Autodesk Desktop Application.
Confirm you have installed the latest version of Twinmotion and it is up to date. If an update is available, apply the update prior to using Revit 2024.

The View tab shows the new Twinmotion ribbon button, which contains the new Open in Twinmotion command alongside the Datasmith Exporter for Revit commands.

Workflow

To launch Twinmotion and create a new direct link connection to the current Revit project:

Open a 3D view of the Revit model.
Click View Twinmotion Open in Twinmotion. This will launch Twinmotion and display a dialog with two options: New project and Existing project.
Select New project.
This will create a new Twinmotion project file and establish a direct link connection with the current Revit model. An initial synchronization is performed to send the geometry visible in the active Revit 3D view to Twinmotion. You can continue the design and visualization process in Twinmotion.
As the design progresses in Revit, the latest changes can be sent to the Twinmotion project file by using the View Twinmotion Synchronize. This will update the Twinmotion project file direct link with all recent changes from the Revit model, based on the active Revit 3D view.

Note: Once the Twinmotion project file is created, you don't need to click

Open in Twinmotion again for the Revit project connected to Twinmotion, unless you want to create a new Twinmotion project with a direct link to the same Revit project.

To launch Twinmotion and open an existing Twinmotion project file without automatically establishing a new direct link connection:

Open the Revit model.
Click View Twinmotion Open in Twinmotion. This will launch Twinmotion and prompt with two options: New project and Existing project.
Select Existing project.
Browse to the Twinmotion project file and open it.

This will open an existing Twinmotion project file without automatically establishing a new direct link connection.

The design and visualization can be continued in Twinmotion. For Twinmotion project files with a direct link connection to the active Revit model, the geometry can be updated to the latest by using View Twinmotion Synchronize, or by enabling Auto Sync.

Notes:

If the existing Twinmotion project file you opened does not contain a direct link connection to the active Revit model, it can be added from Twinmotion under Import > Direct Link and specifying the Revit model from Direct link settings source Import.
You need to be in a 3D view in order to sync.
To see all the active direct link connections, for example the current Revit project connection to the Twinmotion file, click View Twinmotion Connections.

Auto Sync

To enable or disable automatic synchronization of changes from the active Revit model to the direct link connection in Twinmotion or Unreal Engine, choose the desired 3D view and click View Twinmotion Auto Sync to enable automatic synchronization of visible geometry. Once you enabled Auto Sync while in a 3D view, you don't need to keep that view open. All visible geometry in this view will automatically be kept in sync while Auto Sync is enabled.

To switch to a different 3D view, change to the desired view and click

Synchronize command. Or change to the desired view and select and deselect

Auto Sync.

Note: Auto Sync is recommended for small to medium complexity Revit models. For larger or very complex models, it is recommended to use the manual

Synchronize command as needed to send the latest changes to Twinmotion or Unreal Engine.

To do a one-time export of the Revit model to a Datasmith format:

Open the Revit model.
Click View Twinmotion Export to Datasmith File.
This command exports a file that can be imported in Twinmotion without setting up a direct link connection. This may be useful for scenarios where you prefer to import a file containing specific geometry into Twinmotion, Unreal Engine, or when you want to share a file with another design team.

To see the list of errors or warnings related to the export, click View Twinmotion Export Messages

To adjust the export settings, click View Twinmotion Export Settings.

Revit.ini and Environment Variable Customization Options

The following are new options for Revit 2024 that can be specified as either a Revit.ini or as a Windows Environment Variable. If specifying as a Windows Environment Variable, open System Properties Advanced Environment Variables. Under System variables click New. The Variable name will be the same as the Revit.ini name below. The Variable value will be the same as the Revit.ini value of 1.

For additional information on the Revit.ini file, refer to The Revit.ini file.

Skip Datasmith Exporter for Revit Initialization

You can choose to disable the built-in Datasmith Exporter for Revit from ever initializing during the Revit session. By default, Datasmith Exporter for Revit will be initialized at the time when any of the commands under Twinmotion are accessed. If you want to disable this functionality completely (as well as corresponding Twinmotion and Unreal Engine workflows) this is possible by adding [Misc] SkipDatasmithRevitExporterInitialization=1 to the Revit.ini.

Example

[Misc]
SkipDatasmithRevitExporterInitialization=1

Ignore Graphics Card Compatibility Check

The Datasmith Exporter for Revit has built-in checks for detecting the workstation environment prior to initializing, to ensure the graphics card environment is compatible. If you want to disable this check completely, and always initialize, this is possible by adding [Misc] IgnoreGPUCompatibilityCheckForDatasmithRevitExporterInitialization=1 to the Revit.ini.

Example

[Misc]
IgnoreGPUCompatibilityCheckForDatasmithRevitExporterInitialization=1

Move Datasmith Initialization from First Command Use to Revit Startup

By default, Datasmith Exporter for Revit will be initialized at the time when any of the commands under View

Twinmotion are accessed. If you want to move this initialization to part of the Revit startup instead, this is possible by adding [Misc] EnableDatasmithInitializationOnStartup=1 to the Revit.ini.

Example

[Misc]
EnableDatasmithInitializationOnStartup=1