Hi
I could think about a few things that could help:
- use surfaces to smooth flat areas: https://support.pix4d.com/hc/en-us/articles/211083803-How-to-improve-the-3D-Textured-Mesh
- use a third party software. More in this Community post: https://community.pix4d.com/t/3035
- edit the densified point cloud to remove noise, then regenerate the 3D Textured Mesh: https://support.pix4d.com/hc/en-us/articles/202560499 then Process > Generate 3D Textured Mesh.
- modify the processing options, e.g. set to a lower resolution mesh:
A possible workflow to detect issues in the model would be to:
- Create a low resolution model (fast processing)
- Identify parts of the model with issues
- Use the Clipping Box to edit those areas in the point cloud
- Regenerate the model with better resolution
- Check for issues
- Smooth remaining parts with surfaces
Would such a workflow work for you? Someone else has experience with such projects?