Roblox downloaded 145GB models from us (including adult content) without asking

On October 15 and 16, 2026, a Roblox crawler illegally downloaded 145.5 GB of 3D models, including adult content, from Open3DLab, SFMLab, and SmutBase. The crawler, identified by the user agent "trellis2-data-sourcing/1.0," targeted nearly every project on the platforms and downloaded complete copies of 1,027 files from 712 projects. The majority of the downloaded files were adult content from SmutBase, which exclusively hosts adult content.

The crawler ignored Roblox's robots.txt and Terms of Service, which prohibit scraping, and disregarded the creators' non-commercial licenses. Roblox was unaware of the unauthorized downloads until October 18, when they blocked further attempts. The crawler resumed its activity on October 19, but their requests were blocked by Roblox's servers.

Roblox has been developing a 3D foundation model, "Cube," since 2025, which aims to generate 3D characters and avatars. The user agent in the crawler's request belongs to a Roblox researcher involved in the Cube project. The crawler likely collected data for training or evaluating Roblox's 3D foundation model work, as it targeted models and assets needed for such a project.