# Standard .mtl material properties
newmtl RGB
map_Ka textures/checkerboard_ambient.png
map_Kd textures/checkerboard_diffuse.png
map_Ks textures/checkerboard_specular.png
map_Ke textures/checkerboard_emissive.png
map_Ns textures/checkerboard_roughness.png
map_d textures/checkerboard_transparency.png
map_bump textures/checkerboard_bump.png

# PBR "extension"
newmtl PBR
map_Pr textures/checkerboard_roughness.png
map_Pm textures/checkerboard_metallic.png
map_Ps textures/checkerboard_reflection.png
map_Pc textures/checkerboard_specular.png
map_Pcr textures/checkerboard_weight.png
map_Tf textures/checkerboard_transparency.png
map_d textures/checkerboard_weight.png
map_Ni textures/checkerboard_specular.png
map_norm textures/checkerboard_normal.png
map_disp textures/checkerboard_displacement.png

# Non-map_ special cases
newmtl NonMap
norm textures/checkerboard_normal.png
disp textures/checkerboard_displacement.png
bump textures/checkerboard_bump.png