pytorch3d/tests/data/missing_usemtl/README.md

Acknowledgements

This is copied version of docs/tutorials/data/cow_mesh with removed line 6159 (usemtl material_1) to test behavior without usemtl material_1 declaration.

Thank you to Keenan Crane for allowing the cow mesh model to be used freely in the public domain.

Source: http://www.cs.cmu.edu/~kmcrane/Projects/ModelRepository/