Describe the bug
I'm trying to make sure that I understand the purpose of https://github.com/kwea123/nerf_pl/blob/dev/datasets/llff.py#L198. In particular, we're changing the coordinate system of the rotation matrix R but not of the translation vector, which remains in "down right back" coordinates - is that intentional?

Also bmild/nerf#34 suggests that this is mainly intended for forward facing scenes where we're using NDC, but if I'm interpreting the code correctly this transformation still happens for 360 scenes. Is that intentional and desired behavior?

Which branch you use
dev