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nerfstudio-project / nerfacc

A General NeRF Acceleration Toolbox in PyTorch.
https://www.nerfacc.com/
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Are there no coarse and fine NeRF in train_mlp_nerf.py? #171

Closed NagabhushanSN95 closed 1 year ago

NagabhushanSN95 commented 1 year ago

Hi,

I noticed that in train_mlp_nerf.py file, a NeRF MLP is queried only once with stratified sampling. Do you not use hierarchical sampling with coarse and fine MLPs?

MMMazart commented 1 year ago

Yes, they don't use coarse to fine network，because they use another strategy to optimize the sampling process , they use an occupied_grid to skip the empty region, which is mentioned in instant-ngp.

NagabhushanSN95 commented 1 year ago

Okay, I'll check that. Thanks!