VRoid Hub Content Protection Policy

VRoid Hub is a web service for storing, publishing, and sharing 3D character models. Through this platform, people can use their 3D models across various services and applications, while also sharing the appeal and charm of their characters with the community.

The VRoid Hub Development Team continuously conducts research and development related to the rendering and distribution of 3D model data to ensure VRoid Hub is a safe and convenient tool for its community.

However, there are unavoidable technical risks associated with making 3D model data publicly available and shareable via web browsers. To communicate these risks and explain the measures taken to address them, this document outlines VRoid Hub’s content protection methods and policies.

Content Protection Measures

The following are some of the methods used to protect content on our platform.

• VRoid Hub’s Terms of Use strictly prohibit any attempt to reverse engineer content on the service.

• When publishing a model on VRoid Hub, users can select the display method from either “3D Preview” or “Still Image (3D model not displayed)”.

• The data used for 3D previews differs from the original 3D model data uploaded. Unless downloads are explicitly permitted, uploaded files are not made publicly available.

• 3D preview data is delivered in a heavily altered form that significantly distorts the model’s geometry. This processing is performed on demand, and even if the transmitted data were obtained through unauthorized means, it would not be usable as a functional 3D model.

Risks Associated with 3D Model Rendering

VRoid Hub’s 3D preview feature uses WebGL technology to render 3D models in browsers. More specifically, WebGL receives data from the server and loads it into the VRAM (video memory) of PCs, smartphones, VR devices, and other hardware via graphics APIs such as OpenGL and DirectX, for the model to be rendered in the browser.

At this stage, the data required for final rendering necessarily exists in VRAM, making its extraction technically possible. As a result, there is always a risk that a malicious user with sufficient knowledge and technical expertise could obtain portions of this data and reconstruct a 3D model. While it is possible to raise the barrier by making such actions more time-consuming and difficult, entirely preventing such misuse remains a significant challenge.

This risk is not limited to services using WebGL; it applies to all processes that render 3D models using VRAM, including games, applications, and virtual environments. Service providers are tackling this issue through their respective policies and protective measures.

Addressing Risks

Measures are in place to prevent the types of misuse outlined in the Content Protection section, and further improvements will continue. At the same time, because these risks cannot be completely eliminated, it is important to provide a way for everyone to make an informed choice between the value of showcasing dynamic 3D models to a wide audience and the potential risk of that data being scraped.

To add an extra layer of protection, VRoid Hub users can choose to disable 3D previews for published models.

Please review VRoid Hub’s Content Protection Policy and configure settings according to your preferences.

If you come across any activity that appears to involve unauthorized use of 3D model data published on VRoid Hub, do not hesitate to report it via our inquiry form. All reports will be reviewed, investigated, and handled as appropriate.

We will continue improving VRoid Hub through ongoing research and development and regular updates to our measures against unauthorized use, so everyone can showcase their creations with peace of mind.