Wonder3D generates consistent multi-view normal maps and corresponding color images via a cross-domain diffusion model, then applies a novel normal fusion method to achieve fast, high-quality 3D mesh reconstruction. The approach uses cross-domain attention to maintain consistency between RGB and normal domains, and can process a single image into a complete 3D model in approximately 2-3 minutes. It builds on diffusion model techniques with specialized handling for classifier-free guidance across different data domains.