The New Roblox Generative AI System for 3D

A Game-Changer for Creators

Roblox is taking a bold step into the future with its brand-new generative AI system designed specifically for 3D content creation. This innovative technology promises to revolutionize the way developers and creators build their virtual worlds, making the process faster, more intuitive, and more accessible than ever before. Whether you’re a seasoned game designer or just starting out, this AI-powered tool could change the way you think about 3D modeling on the platform. In this post, we’ll explore what this new system offers, how it works, and why it’s set to transform the Roblox creative experience.

About the Roblox Generative AI

Roblox recently open-sourced their 3D foundational model called Cube 3D on GitHub and HuggingFace, making it available to everyone. They’ve also launched a beta mesh generation API. Cube 3D will support various AI tools in the future, including complex scene-generation capabilities, and will eventually function as a multimodal model that works with text, images, video, and other inputs.

Unlike current 3D generation methods that use image reconstruction, Cube 3D generates 3D models directly from text (and eventually images) by training on native 3D data. This creates fully functional objects compatible with game engines—comparable to building actual 3D structures rather than flat movie sets.

Their innovative approach applies token prediction techniques (similar to how language models predict text) to 3D shapes, enabling Cube 3D to predict shape tokens to build complete objects. For scene generation, it predicts layouts and then recursively predicts shapes to complete those layouts.

Roblox is committed to openness in AI development, allowing anyone to fine-tune or train Cube 3D on custom data. This release aligns with their broader commitment to the open-source AI community, including their previous safety model release and co-founding of ROOST, a nonprofit focused on digital safety tools. Their goal is to help advance 3D generation technology across the entire industry.

About Cube 3D for Creation

Roblox believes AI can enhance 3D creation, enabling more immersive and personalized experiences. They’re building infrastructure to support AI throughout the creation process for both developers and users. Their vision includes developers empowering Roblox’s 85+ million daily active users with AI capabilities within gameplay.

Over the past year, Roblox introduced AI-powered Assistant features in Roblox Studio to help developers streamline their workflow and eliminate manual work. Their Cube technology aims to make 3D creation more efficient, with the new 3D mesh generation allowing developers to quickly explore creative options and increase productivity.

For example, when building a racing game, developers can use simple prompts like “/generate a motorcycle” or “/generate orange safety cone” to instantly create mesh versions of these objects, which can then be enhanced with textures and colors. This approach eliminates hours of modeling simple objects, allowing developers to focus on more creative aspects like track design and gameplay mechanics. In the future, Roblox plans to enable the creation of more complex objects and entire scenes.

3D objects generated with Cube

Showing of Roblox Cube

All credits for these 3D models and the Video go to Roblox

How the Roblox Cube Works

The primary technical challenge was creating a connection between text/images and 3D shapes. Roblox achieved this breakthrough through 3D tokenization, which represents 3D objects as tokens similar to how text is tokenized. This allows their system to predict the next shape in a sequence, much like language models predict words.

For 3D generation, they developed a unified architecture using autoregressive transformers—neural networks that use previous inputs to predict subsequent components. This architecture offers both scalability and multimodal compatibility, enabling the model to eventually work with various input types (text, visual, audio, and 3D). The open-sourced model currently allows creators to generate 3D objects from text prompts, with plans to enable full scene generation from multiple input types in the future.

Their approach trains a generative pretrained transformer (GPT) for shape generation by using discrete 3D shape tokens aligned with text prompts. This innovative method establishes a foundation for creating playable 3D generated scenes.

Where Cube Is Heading

While AI is commonly used for text and image prediction, creating interactive 3D scenes presents greater complexity because elements must work together contextually. Consider a scene with “an avatar on a motorcycle in front of a racetrack with trees”—it combines various 3D meshes (trees, detailed motorcycle), Roblox parts (buildings), complex geometric features (avatar), and requires bounding boxes for proper spatial arrangement. Though traditionally time-consuming, AI can assist with each step, allowing creators to develop initial versions faster and spend more time refining their work.

Roblox aims to create fully functional 3D objects and scenes—what they call “4D creation,” where the fourth dimension represents interaction between objects, environments, and people. This requires not just building 3D elements but understanding relationships between them, which is where their Cube technology is headed.

Beyond the current mesh generation capability, they plan to expand into scene generation and understanding, which will help match users with relevant experiences and allow contextual scene modifications. For example, developers could instruct the Assistant to change green leaves to fall colors in a forest scene. Their AI tools respond to developer requests, helping them rapidly create and adapt experiences.

Conclusion

The introduction of Roblox’s generative AI system marks an exciting new era for 3D creation on the platform. By simplifying complex design processes and empowering users of all skill levels, this technology is opening up endless possibilities for innovation and creativity. As Roblox continues to evolve, tools like these are not just enhancing the user experience—they’re reshaping what’s possible in the world of virtual development. Whether you’re building your first game or crafting an entire metaverse, this AI system could be the tool that brings your ideas to life faster and smarter than ever before.

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Wriitten by:

Pietro Gerald

Roblox

Roblox is an online game platform and game creation system developed by Roblox Corporation that allows users to program and play games created by themselves or other users.

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