models/pbr-mat-ext.mtl

# .MTL with PBR extension.
newmtl pbr
Ka 0 0 0
Kd 1 1 1
Ks 0 0 0
Ke 0.1 0.1 0.1
Pr 0.2
Pm 0.3
Ps 0.4
Pc 0.5
Pcr 0.6
aniso 0.7
anisor 0.8
map_Pr roughness.tex
map_Pm metallic.tex
map_Ps sheen.tex
map_Ke emissive.tex
norm normalmap.tex