Sara Fridovich-Keil

Again, the code was written by my coauthor, but my guess would be that the function is used in grid upsampling, where we increase the grid resolution during training. If...

We interpolate the SH coefficients from the neighboring voxels, then evaluate at the current ray direction to get RGB color.

Let $a_i$ be the interpolation coefficient for neighbor $i$ (as in your notation), and let $v_i$ be the SH coefficient stored at neighbor $i$. I think what we do is...

As far as I understand it, the difference between a panorama and the 360 degree scenes that we evaluate on is that a panorama is typically background-only, and could probably...

To reduce the memory requirements there are a few things to try. You can try reducing the final resolution, changing the optimizer (from RMSProp to SGD; SGD uses much less...

Absolutely! You can see an example of this in our video at around 4:30: https://alexyu.net/plenoxels/

Yes, currently the models can render at ~15 frames per second.

It looks like code is not available for this yet, but I recently came across a paper that targets floater reduction in Plenoxels, through a mix of initialization and regularization...

The grid size and position are determined by the 'center' and 'radius' parameters: https://github.com/sxyu/svox2/blob/master/opt/opt.py#L286