newmtl structure
	Ns 10.0000
	Ni 1.5000
	d 1.0000
	Tr 0.0000
	Tf 1.0000 1.0000 1.0000 
	illum 2
	Ka 0.5880 0.5880 0.5880
	Kd 0.5880 0.5880 0.5880
	Ks 0.0000 0.0000 0.0000
	Ke 0.0000 0.0000 0.0000
	map_Ka structure_diffuse.png
	map_Kd structure_diffuse.png
	map_Ks structure_specular.png
	map_bump structure_normal.png

newmtl tree
	Ns 10.0000
	Ni 1.5000
	d 1.0000
	Tr 0.0000
	Tf 1.0000 1.0000 1.0000 
	illum 2
	Ka 0.3608 0.3608 0.3608
	Kd 0.3608 0.3608 0.3608
	Ks 0.0000 0.0000 0.0000
	Ke 0.0000 0.0000 0.0000
	map_Ka foliage_diffuse.png
	map_Kd foliage_diffuse.png
	map_Ks foliage_specular.png
	map_bump foliage_normal.png