Compare DreamFusion vs. RODIN

Recent advancements in the realm of text-to-image synthesis have emerged from diffusion models that have been trained on vast amounts of image-text pairs. To successfully transition this methodology to 3D synthesis, it would necessitate extensive datasets of labeled 3D assets alongside effective architectures for denoising 3D information, both of which are currently lacking. In this study, we address these challenges by leveraging a pre-existing 2D text-to-image diffusion model to achieve text-to-3D synthesis. We propose a novel loss function grounded in probability density distillation that allows a 2D diffusion model to serve as a guiding principle for the optimization of a parametric image generator. By implementing this loss in a DeepDream-inspired approach, we refine a randomly initialized 3D model, specifically a Neural Radiance Field (NeRF), through gradient descent to ensure its 2D renderings from various angles exhibit a minimized loss. Consequently, the 3D representation generated from the specified text can be observed from multiple perspectives, illuminated with various lighting conditions, or seamlessly integrated into diverse 3D settings. This innovative method opens new avenues for the application of 3D modeling in creative and commercial fields.

This innovative 3D avatar diffusion model is an artificial intelligence framework designed to create exceptionally detailed digital avatars in three dimensions. Users can explore the resulting avatars from all angles, enjoying an unprecedented level of quality in their visuals. By significantly streamlining the traditionally intricate process of 3D modeling, this model paves the way for new creative possibilities for 3D artists. It generates these avatars utilizing neural radiance fields, leveraging cutting-edge generative techniques known as diffusion models. The approach incorporates a tri-plane representation to effectively decompose the neural radiance field of the avatars, allowing for explicit modeling through diffusion and rendering images via volumetric techniques. Moreover, the introduction of 3D-aware convolution enhances computational efficiency, all while maintaining the fidelity of diffusion modeling in the three-dimensional space. The entire generation process operates hierarchically, utilizing cascaded diffusion models to facilitate multi-scale modeling, which further refines the intricacies of avatar creation. This advancement not only changes the landscape of digital avatar production but also enhances collaborative efforts among artists and developers in the field.