result resolution, Enhance and Export

[Tungway1990]

Hi guys,

I have tried this awesome techniques and the result resolution is far behind the below link:
https://www.youtube.com/watch?v=DJ2hcC1orc4&t=19s

Is there anyway to further enhance the resolution of result? (of course I have read https://github.com/NVlabs/instant-ngp/blob/master/docs/nerf_dataset_tips.md)

And, I would highly appreciate if there are ways to export 3D render result, not only the mesh object.

Thanks.