[Docs] Wondering about which part of ScanNet v2 is needed

[gujiaqivadin]

Branch

main branch https://mmdetection3d.readthedocs.io/en/latest/

📚 The doc issue

I am preparing the data of EmbodiedScan. As ScanNet v2 is about 1.5T storage, I am wondering whether all the file is needed for preparing the data. Some other works may not that only a subset of ScanNet is needed.

Suggest a potential alternative/fix

like Vote2Cap-DETR: https://github.com/ch3cook-fdu/Vote2Cap-DETR/tree/master/data/scannet

[mxh1999]

Unfortunately, embodiedscan requires scannet's image files (RGB and depth), which take up most of the storage. Actually, only .sens and .ply files are necessary. However, since the .sens file is very large, this may not save much space.