Create a Volumne Desnity of a Scene

[SeskoDk]

Hi,

First of all, thanks for your great work!
I am currently exploring the framework and was wondering if it is possible to generate a volume density representation of a scene using NeuS2.

Specifically, I would like to obtain a 3D grid or function that represents the density values throughout the scene.
If this is achievable, could you provide some guidance on how to extract this information?

Some related questions:

1. Is there an existing function or API call to obtain the volume density?
2. Would I need to modify the SDF representation or rendering pipeline to achieve this?
3. Any pointers on relevant parts of the code would be greatly appreciated!

For testing, I would like to use the classic Lego dataset from Nerf using its transform.json file.

Looking forward to your insights. Thanks in advance for your help!

Best regards,
Sesko

[19reborn]

Hi, thanks for your interest in NeuS2! We haven't implemented an API specifically for exporting the volume density, but we do store a related structure: m_nerf.density_grid.
Please note that the SDF is the primary representation we optimize for accurate surface modeling, while the density is mainly used as a rough approximation of the geometry.