Unity Shader Property Names

Legacy

• _MainTex (Texture, diffuse color in the RGB channels, transparency in the A channel)
• _Color (Color, diffuse color tint. This is multiplied by _MainTex)
• _SpecMap (Texture, specular map)
• _SpecColor (Color, specular color tint)
• _Shininess (Value or Slider, controls glossiness)
• _BumpMap (Texture, normal map)
• _TransparencyLM (Texture, rgb channels define colored transparency)
• _Illum (Texture, for emissive materials. This will be a mask of _MainTex * _Color)

Standard

• Albedo  (diffuse color)
• Normal (tangent space normal, if written)
• Emission
• Specular (specular power in 0..1 range)
• Gloss (specular intensity)
• Alpha (alpha for transparencies)

Physical (metallic)

• Albedo (base - diffuse or specular - color)
• Normal (tangent space normal, if written)
• Emission
• Metallic (0=non-metal, 1=metal)
• Smoothness (0=rough, 1=smooth)
• Occlusion (occlusion - default 1)
• Alpha (alpha for transparencies)

Physical (specular)

• Albedo (diffuse color)
• Specular (specular color)
• Normal (tangent space normal, if written)
• Emission
• Smoothness (0=rough, 1=smooth)
• Occlusion (occlusion  - default 1)
• Alpha (alpha for transparencies)