Installation

Note that administrator privileges are required for installation and licensing.

Installation Steps

1

Portal Login

Login to the Theia Software Downloads portal

• The main contact person for the group accountt should have received an email from [email protected] with the subject line: Portal Account Created. This can end up in spam. Within this email, click Verify Email.

• If you were a contact person for your group account, follow the steps below to complete the setup of your user account:

1. Visit the portal at portal.theiamarkerless.com

2. Click “Forgot Password”

3. Enter your email address associated with your Theia account

4. Click “Reset Password”

5. Follow the instructions in the email to set your new password

Copy your license key for safekeeping offline.

• If you were not previously a contact person for your group account, an individual user account will need to be created for you by your group owner or Theia Support. Please let us know if you require an individual account to be created and we will gladly complete this for you.

For more information about the new self-service portal, please check out our documentation

2

Download

In the portal, navigate to the Downloads section. Newest and previous verisons of Theia are available for download.

Note:

For Theia3D Axiom v2025 and later, engines are built automatically for all graphics cards—no engine installers are required.

For Theia3D Apollo v2024 and earlier, engine installers are available for RTX 3090 and RTX 4090 graphics cards. Engines for all other graphics cards are generated automatically the first time Theia3D is run.

3

Drivers

Ensure the correct drivers are installed for your GPU.

• For NVIDIA GeForce RTX 5090 GPUs, we require driver 572.83. Download and install the driver from the link https://www.nvidia.com/en-us/drivers/details/242277/

• For other GPUs, we recommend using the most recent drivers. Use the NVIDIA App to check if your drivers are up-to-date, and install any available updates if not.

Both GeForce Game Ready Driver and NVIDIA Studio Driver are compatible with Theia3D

4

Run Theia3D

Run the Theia3D application installer and follow the instructions

• You must scroll to the bottom of the EULA to accept it.

• If you downloaded a Graphics Card Engine from the Theia Software Downloads portal, run the executable once the Theia3D application installer has finished.

5

Launch Theia3D for the first time.

• Run Theia3D as an administrator, and when prompted, enter your license key to activate the software.

• If a Graphics Card Engine was not available for your GPU from the Theia Software Downloads portal, they will be built automatically at this stage.

  • Click YES

  • This can take several (~30) minutes, but is only required the first time Theia3D is opened.