Some doubts about coordinate transformations in n3v2blender.py?

[Duanener]

Thank you for sharing such excellent work! However, as a newcomer, I'm encountering some issues while running it and would appreciate some help.
It seems that lines 264 and 265 in scripts/n3v2blender.py

4d-gaussian-splatting/scripts/n3v2blender.py

Line 264 in 3fe460f

poses[:, 0:3, 1] *= -1

have already completed the transformation from the colmap coordinate system (RDF) to the Blender coordinate system (RUB).
Then the code lines 266 and 267

4d-gaussian-splatting/scripts/n3v2blender.py

Line 266 in 3fe460f

poses = poses[:, [1, 0, 2, 3], :] # swap y and z

seem be unnecessary，or I overlook anything?