Material Render Outputs
This topic describes the different Material render outputs.
Diffuse Amount
The Diffuse Amount output renders a scene as grayscale image that represents the diffuse amount values per surface, independent of illumination or shading.
Diffuse Coefficient
The Diffuse Coefficient output renders a scene as a full-color image that represents the diffuse colors of a scene taking into account Fresnel values and energy conservation; independent of illumination or shading.
Diffuse Color
The Diffuse Color output renders a scene as a full-color image that represents the diffuse colors of a scene independent of illumination or shading.
Diffuse Energy Conservation
The Diffuse Energy Conservation output renders a scene as a grayscale image that represents the Energy Conservation values for surfaces based on the Fresnel and Energy Conservation option settings.
Diffuse Roughness
The Diffuse Roughness output renders a scene as a grayscale image that represents the Diffuse Roughness values of a Material in a scene, independent of any illumination or shading.
Reflection Coefficient
The Reflection Coefficient output renders a scene as a grayscale image that represents the reflection amount per surface. Black for 0% reflectivity, ramping toward white at 100%.
Roughness
The Roughness output renders a scene as a grayscale image that represents the roughness amount per surface. Black for 0% roughness, ramping toward white at 100%.
Specular Coefficient
The Specular Coefficient output renders a grayscale image that represents the amount of specular on surfaces within a scene. Black for 0% specularity, ramping toward white at 100% specular.
Subsurface Amount
The Subsurface Amount output renders a grayscale image that represents the amount of subsurface scattering on surfaces within a scene. Black for 0% subsurface scattering, ramping toward white at 100%.
Subsurface Color
The Subsurface Color output renders a scene as full color image that represents the Subsurface coloring of a scene independent of illumination or shading.
Transparent Amount
The 'Transparent Amount' output renders a grayscale image that represents the amount of transparency on surfaces within a scene. Black for 0% Transparency ramping toward white at 100%.
Transparent Color
The Transparent Color output renders a scene as a full-color image that represents the transparent coloring of a scene independent of illumination or shading.
Compositing Outputs
Render outputs are incredibly useful when you wish to compose the generated layers individually in an external application, such as Photoshop, After Effects, Nuke or Fusion. This can aid in tweaking color, among other settings as a post process without requiring additional render time. The question most often asked is which render outputs combine to equal the final color output. The answer is Diffuse Shading (Total) + Transparent Shading + Reflection Shading + Specular Shading + Subsurface Shading + Luminous Shading = Final Color, where each successive layer is added to the layer below in the composition (also called linear dodge). Rendering each layer at a gamma of 1.0 and then combining them and adding the gamma back to the fully composed layers produce the best results.
You may also render out simultaneous alpha channels for each item in a scene by creating item masks for each and placing a render output set to Effect > Alpha (or simply adding them to existing Shader Tree masks). Then each time a render command is invoked, all active render outputs get generated simultaneously.
