Implement DreamGaussian if it's better

**Is your feature request related to a problem? Please describe.**
Improve the generation of 3D assets in MirageStock. 

**Describe the solution you'd like**
Would like to see a comparison of https://github.com/dreamgaussian/dreamgaussian to current 3D generations.

**Additional context**
If it works well, would be great to set as the default 3D generation for MirageStock!