MTL File Documentation

Overview

Feature Value
File Extension .mtl
Format Type ASCII Text
Used With OBJ Geometry File
MIME Type text/plain
Primary Purpose Material Properties Definition
Supports Texturing Yes
Supports Material Colors Yes
Supports Material Dissolve Yes
Supports Illumination Models Yes
Keywords for Defining Material Properties newmtl, Ka, Kd, Ks, Ns, Ni, d, illum
Texture Map Support map_Kd, map_Bump, map_d, disp, refl
Refraction Index Property Ni
Opacity Property d or Tr
Ambient Color Property Ka
Diffuse Color Property Kd
Specular Color Property Ks
Specular Exponent Property Ns
Optical Density (aka Index of Refraction) Ni
Illumination Model Definition illum
Maximum Shadow Bias Specific to Rendering Program