newmtl red_material
# ambient values
Ka  0.1 0 0
# diffues values
Kd  1 0 0 
# specular values
Ks  1 1 1
# sharpness of specular reflection
Ns  10
# texture map filename
map_Kd not_a_real_file.png

newmtl green_material
Ka  0 0.1 0
Kd  0 1 0 
Ks  0 1 0 
# reflection amount
r 0.5
# sharpness of reflection
sharpness 30

newmtl blue_material
Ka  0 0 0.5
Kd  0 0 1
Ks  1 1 1
# transparency amount
d  0.5
# index of refraction
Ni  1.33
Ns  0

# you will need to cook up your own values for the light output
newmtl light_material
Ka  1 1 1
Kd  1 1 1
Ks  1 1 1