newmtl Material1
Ka 0.000000 0.000000 0.000000
Kd 1.000000 1.000000 1.000000
Ks 0.000000 0.000000 0.000000
map_Kd ./texture.png

newmtl Material2
Ka 0.000000 0.000000 0.000000
Kd 1.000000 1.000000 1.000000
Ks 0.000000 0.000000 0.000000
map_Kd texture.png