Paint3D: Paint Anything 3D with Lighting-Less Texture Diffusion Models

April 27, 2024

Introduction

Paint3D is an innovative coarse-to-fine generative framework designed to create high-resolution, lighting-less, and diverse 2K UV texture maps for untextured 3D meshes based on text or image inputs. This feature opens exciting possibilities for 3D modeling and texture design.

Technical Details

Paint3D addresses the challenge of generating high-quality textures without embedded illumination information. This unique approach enables the textures to be easily re-lighted or re-edited- perfect for modern graphics workflows.

The process begins by utilizing a pre-trained depth-aware 2D diffusion model to generate view-conditional images.
This is followed by multi-view texture fusion which produces an initial coarse texture map.
However, due to the limitations of 2D models in capturing 3D shapes, the coarse texture map may have incomplete areas and illumination artifacts.
To address these issues, Paint3D employs specialized UV Inpainting and UVHD diffusion models to refine the shapes and remove artifacts.
This rigorous coarse-to-fine process results in high-quality 2K UV textures that maintain semantic consistency while being lighting-less.

Understanding the Process: An Analogy

Imagine you are an artist painting a mural on a large wall. At first, you might start with a wide brush, creating a rough outline of your design—that’s your initial coarse texture map. Later, you notice some areas are patchy, and some shadows don’t look quite right; this requires delicate brushwork to fill in the gaps and adjust the lighting effects. This meticulous refinement represents the UV Inpainting and UVHD diffusion steps, culminating in a final mural that is vibrant and perfectly polished, just like Paint3D’s high-resolution textures.

Troubleshooting

If you encounter issues while using Paint3D, consider the following troubleshooting strategies:

Ensure that you have the correct dependencies installed for the depth-aware 2D diffusion model.
Check your input data formats for compatibility with the texture generation process.
If you find that textures are not applying correctly, verify the integrity of your UV mapping on your 3D models.
Always refer to the GitHub documentation for the latest updates and community contributions.

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Conclusion

At fxis.ai, we believe that such advancements are crucial for the future of AI, as they enable more comprehensive and effective solutions. Our team is continually exploring new methodologies to push the envelope in artificial intelligence, ensuring that our clients benefit from the latest technological innovations.