Open3DLab says a crawler identifying itself as Roblox’s “trellis2-data-sourcing” scanned nearly all projects on Open3DLab, SFMLab and SmutBase on October 15-16, 2026. It viewed 18,926 project pages and downloaded 1,027 files from 712 projects, totaling 145.5 GB. Of those projects, 345 contained adult material, including 224 projects from SmutBase, an adult-only site. The crawler reportedly ignored robots.txt and site terms, and 423 downloaded projects had non-commercial licenses. After the sites blocked it, the crawler made further attempts before stopping. Roblox did not respond to requests for comment.
The site operators infer that the downloads were likely collected for Roblox’s 3D foundation-model research, citing the crawler’s label, its connection to a researcher involved in Roblox’s Cube project, and the suitability of the files for training. They stress they cannot confirm the purpose or whether any material entered a model. Their central concern is that automated collection took explicit assets without permission or filtering, potentially putting adult material into tools used by a platform with many child users; copies may also persist after creators remove their work. They frame the incident as part of a wider pattern of AI companies acquiring creative work without consent, and argue that copyright enforcement appears harsher on individuals and nonprofits than on powerful firms. This criticism is reinforced by Roblox’s past controversies, though those do not prove wrongdoing in this case.
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