Is occupancy grid utilized in NeRF implementation?

NVIDIAGameWorks / kaolin-wisp

NVIDIA Kaolin Wisp is a PyTorch library powered by NVIDIA Kaolin Core to work with neural fields (including NeRFs, NGLOD, instant-ngp and VQAD).

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Is occupancy grid utilized in NeRF implementation? #40

Closed kevinhangoat closed 1 year ago

kevinhangoat commented 2 years ago

Hi, in the instant-ngp paper, there is an occupancy grid updated and used in NeRF ray marching. But I think this is not implemented yet in wisp? Would you mind give more details about difficulties when implementing it and why it cannot work? Thank you so much.

tovacinni commented 1 year ago

The occupancy grid is used and you can find it here: https://github.com/NVIDIAGameWorks/kaolin-wisp/blob/main/wisp/models/nefs/nerf.py#L81