storing weights_list[] and ray_samples_list[] in outputs{} dictionnary

[yhaddouda]

I am trying to profile the nerfstudio implementation of nerfacto, and I have a question. I have noticed that in the propsal sampler they store weights and raysamples in a list that contains for every step three elements. And these two lists are stored in the outputs dictionnary at the end. Although they say the saving only happens in training mode because they require memory and take time, I do not understand why do we need to save those two lists and calculate them other than debugging purposes, so is there another reason that I am missing for saving those two heavy lists ?

[yhaddouda]

For anyone with the same questions, the two variables are stored in the GPU in training mode because they are used to calculate distortion loss from MipNerf360 for unbounded scenes. So if you use indoor scenes it could be useful to not store them.