difference of 'pixel_colors_nr' and 'pixel_colors_nr_fine'

[blue-531]

Thank you for sharing the source code.
However, I have a question about the difference between 'pixel_colors_nr' and 'pixel_colors_nr_fine,' which appear to represent the rendered color values.
It seems that both are obtained by sampling 64 points and rendering 'c.'
Are the values recorded in 'Table 1' obtained using only one of these methods, or is there a different sampling method used to obtain those values?

[SYSUykLin]

You can draw an analogy with nerf. pixel_colors_nr is the coarse model rendering, pixel_colors_nr_fine is the fine model rendering.

[liuyuan-pal]

They are fine or coarse sampled colors. Tables all use the fine-level results.