Download Resources

Download PBR Textures

To run bf.get_pbr_material_infos() and bf.add_pbr_material(), we have to download the PBR textures first. We use textures from https://ambientcg.com/.

python scripts/download_pbr.py

This script will automatically download 1153 pbr textures to resources/cctextures, totalling 17.8 GB.

Reference: https://help.ambientcg.com/02-Using%20the%20assets/The_different_PBR_maps.html

Download HDR Textures

To run bf.get_hdr_material_infos() and bf.set_hdr_background(), we have to download the HDR textures first. We use textures from https://polyhaven.com/hdris.

python scripts/download_hdr.py

This script will automatically download 476 hdr textures to resources/hdr, totalling 12.4 GB.

Download & Process ABC datasets

ABC(A Big CAD) Model Dataset contains 1 million models. It’s too big to use the raw datasets (600GB compressed files, several TB of model files).

To use this dataset, we have to simplify it. We write a script to automatically download and process the ABC dataset.

There are a total of 100 zip packages, each with 10,000 models. To download and process the first zip package:

python scripts/download_and_process_abc.py --abc_index=0

The processed model files will be in resources/abc/done/abc_00??_stl2_v00 directory.

What does this script do?

download zip package, check md5 sum
uncompress zip package
for model in the raw models:
    if model too big, skip
    if model have multiple parts, skip
    decimate model to 10000 faces
    reset model's origin to center of mass
    export model

Multiple process running (3 processes):

for i in {0..99};do echo $i;done | xargs -n 1 -P 3 sh -c 'python scripts/download_and_process_abc.py --abc_index=$0

The processed ABC dataset have 769,196 items, totalling 179.3 GB.