pytorch3d/docs/tutorials/data/cow_mesh/cow.mtl

newmtl material_1
map_Kd cow_texture.png

# Test colors

Ka 1.000 1.000 1.000  # white
Kd 1.000 1.000 1.000  # white
Ks 0.000 0.000 0.000  # black
Ns 10.0