  Recent advances in 3D content creation mostly leverage optimization-based 3D
generation via score distillation sampling (SDS). Though promising results have
been exhibited, these methods often suffer from slow per-sample optimization,
limiting their practical usage. In this paper, we propose DreamGaussian, a
novel 3D content generation framework that achieves both efficiency and quality
simultaneously. Our key insight is to design a generative 3D Gaussian Splatting
model with companioned mesh extraction and texture refinement in UV space. In
contrast to the occupancy pruning used in Neural Radiance Fields, we
demonstrate that the progressive densification of 3D Gaussians converges
significantly faster for 3D generative tasks. To further enhance the texture
quality and facilitate downstream applications, we introduce an efficient
algorithm to convert 3D Gaussians into textured meshes and apply a fine-tuning
stage to refine the details. Extensive experiments demonstrate the superior
efficiency and competitive generation quality of our proposed approach.
Notably, DreamGaussian produces high-quality textured meshes in just 2 minutes
from a single-view image, achieving approximately 10 times acceleration
compared to existing methods.
