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    HomeAI PapersCoin3D Introduces Controllable and Interactive 3D Assets Generation

    Coin3D Introduces Controllable and Interactive 3D Assets Generation

    New Framework Allows Users to Control and Edit 3D Models with Ease

    • Interactive Generation Workflow: Coin3D enables users to control 3D generation using coarse geometry proxies, allowing seamless local part editing and responsive previews.
    • Innovative Techniques: The framework employs several novel techniques, including a 3D adapter for shape control, proxy-bounded editing, progressive volume cache, and volume-SDS for consistent mesh reconstruction.
    • Future Enhancements: Potential improvements include fine-tuning for cleaner 2D previews, better resolution for fine details, and generating objects with PBR materials.

    The creation of 3D assets has long been a complex and time-consuming process, often lacking the controllability and efficiency seen in 2D image generation. The introduction of Coin3D, a novel framework for controllable and interactive 3D assets modeling, aims to bridge this gap. Coin3D allows users to control the generation of 3D objects using coarse geometry proxies and supports interactive workflows that enable seamless editing and rapid previews of 3D models.

    Interactive Generation Workflow

    Coin3D revolutionizes the 3D modeling process by allowing users to start with a coarse geometry proxy, composed of basic shapes, to guide the generation of 3D models. This proxy-guided conditioning approach provides a high level of control over the resulting assets. Users can interactively edit specific parts of the 3D model and see responsive previews within seconds, greatly enhancing the efficiency and creativity of the modeling process.

    The workflow begins with synthesizing 2D image candidates for quick preview and selection. While this step requires careful prompt engineering to avoid complex background textures, it sets the stage for detailed 3D generation and editing. Users can freely alter prompts or shapes, regenerate designated local parts, and inspect changes interactively.

    Innovative Techniques

    To achieve its level of control and interactivity, Coin3D incorporates several advanced techniques:

    • 3D Adapter: This component applies volumetric coarse shape control to the diffusion model, ensuring that the generated 3D objects closely follow the user-defined proxy shapes.
    • Proxy-Bounded Editing Strategy: This technique allows for precise part editing, enabling users to modify specific regions of the model without affecting the overall structure.
    • Progressive Volume Cache: Supports responsive previewing by caching volumetric data, allowing for quick updates and refinements.
    • Volume-SDS: Ensures consistent mesh reconstruction, maintaining the integrity of the model during the generation and editing process.

    These techniques collectively provide a robust framework for generating high-quality 3D assets with a high degree of user control and flexibility.

    Future Enhancements

    While Coin3D represents a significant advancement in 3D asset generation, there are several areas identified for future improvement:

    1. Enhanced 2D Previews: The initial synthesis of 2D image candidates, which facilitates quick previews, can be improved by fine-tuning a 2D diffusion model with object-centric data. Incorporating LLM-based prompt enhancement can further streamline this process, ensuring cleaner and more satisfactory previews.
    2. Increased Resolution for Fine Details: The current limitation in the base diffusion model’s resolution restricts the generation of fine-level details, such as complex textures. Adopting more advanced backbones or implementing a high-resolution optimization stage can address this limitation and produce more detailed and realistic 3D models.
    3. PBR Materials Integration: Coin3D’s reconstructed texture meshes currently lack physically-based rendering (PBR) materials, which are essential for modern rendering pipelines. Future work could involve training a material-disentangled diffusion model to generate objects with PBR materials, enhancing the visual fidelity and realism of the generated assets.

    Coin3D marks a significant step forward in the field of 3D modeling, offering a new level of control and interactivity in the generation of 3D assets. By leveraging advanced techniques and a user-friendly workflow, Coin3D enables creators to produce high-quality models efficiently. As the framework continues to evolve, with potential improvements in resolution, material integration, and prompt enhancement, it promises to further revolutionize the process of 3D asset creation, making it more accessible and effective for a wide range of applications.

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