newmtl cerc_base_material
Ka 1.0 1.0 1.0      # Ambient color (white)
Kd 0.1 0.3 0.1      # Diffuse color (greenish)
Ks 1.0 1.0 1.0      # Specular color (white)
Ns 400.0             # Specular exponent (defines shininess)