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Modo Materials

The plugin includes some basic real-time conversion of Modo MaterialsA set of attributes or parameters that describe surface characteristics..

NOTE: Due to the global nature of the Modo Shader Tree, changes to Modo Materials require the plugin to rebuild all materials in the scene. Heavier scenes may display a progress bar. For best performance, convert all materials to Octane Overrides. The plugin can process Override changes individually, rather than rebuilding all materials.

Material Channel Support

The following Modo MaterialThe representation of the surface or volume properties of an object. channels are supported:

• DiffuseAmount of diffusion, or the reflection of light photons at different angles from an uneven or granular surface. Used for dull, non-reflecting materials or mesh emitters. Amount / Color
• Use Refractive Index
• SpecularAmount of specular reflection, or the mirror-like reflection of light photons at the same angle. Used for transparent materials such as glass and water. Amount / Fresnel / Color
• Reflection Amount / Fresnel / Color
• Roughness
• Bump Amplitude
• DisplacementThe process of utilizing a 2D texture map to generate 3D surface relief. As opposed to bump and normal mapping, Displacement mapping does not only provide the illusion of depth but it effectively displaces the actual geometric position of points over the textured surface. Distance
• Rounded Edge Width
• Round Same Surface Only
• Smoothing / Angle
• Normal Method
• Weight by options
• Crease by options / Smoothing Groups
• Transparent Amount / Color
• AbsorptionDefines how fast light is absorbed while passing through a medium. Distance
• Refractive Index
• Dispersion
• Refraction Roughness
• Luminous Intensity / Color

Volumes also support the following Modo Material > Material Rays > Volumetrics channels:

• ScatteringDefines how fast light gets scattered when traveling through the medium. Amount
• Scattering Color
• Absorption Amount
• Absorption Color
• Luminosity Amount
• Luminosity Color
• Density

Material conversion notes:

• Materials with no "Specular Amount / Fresnel / Color" convert to Octane Diffuse Materials.
• Materials with a "Transparent Amount" greater than the "Specular Opacity Threshold" in Octane's preferences, convert to Octane Specular Materials.
• Materials with "Luminous Intensity / Color" convert to Octane Diffuse Materials with Texture Emission.
• All other cases convert to Octane GlossyThe measure of how well light is reflected from a surface in the specular direction, the amount and way in which the light is spread around the specular direction, and the change in specular reflection as the specular angle changes. Used for shiny materials such as plastics or metals. Materials.
• Displacement uses Octane's Texture Displacement node.
• Rounded Edges use Octane's "Accurate" mode.

Shader Layer Support

Shaders with Alpha Type set to Shadow CatcherThe Shadow Catcher can be used to create shadows cast by objects onto the surrounding background imagery. The shadows cast are not limited to simply a ground plane but can be cast onto other surfaces of varying shapes., are converted to Octane Diffuse Materials with Shadow Catcher enabled. Modo requires materials with Shaders, to be placed above the Base Shader.

Shader Tree Effect Support

The following Shader Tree Effects are supported:

• Basic Channels
  • Diffuse Color
  • Diffuse Amount - Only supports Constant layers.
  • Dissolve
  • Luminous Color
  • Roughness
  • Specular Color
  • Specular Amount
  • Transparent Color - Only supports Constant layers.
  • Transparent Amount - Only supports Constant layers.
• Shader Control
  • Layer Mask - Only masks Diffuse Color layers.
• Special Effects
  • Stencil
  • RGBA
• Surface Shading
  • Bump
  • Displacement
  • Normal
• Light Effects
  • Light Color
• Environment Effects
  • Environment Color

Image Map Texture Layer Support

The following Image Map texture layer channels are supported:

• Invert
• Opacity - Only supported by Bump and Normal Effects.
• High Value - Only supported by Diffuse Color, Roughness and Environment Color Effects.
• GammaThe function or attribute used to code or decode luminance for common displays. The computer graphics industry has set a standard gamma setting of 2.2 making it the most common default for 3D modelling and rendering applications.
• Alpha ChannelA greyscale image used to determine which areas of a texture map are opaque and which areas are transparent. - Only supported by RGBA and Stencil Effects.

Image Still Colorspace Support

When an Image Map Texture Layer is used in the Shader Tree, the Image Still Colorspace has some limited support. These Colorspaces use a gamma of 2.2 in Octane: sRGB, sRGBf, Rec. 709, Gamma 2.2. Colorspace Gamma 1.8 uses a gamma of 1.8. Colorspace (default) causes Modo to use the scene default. All other Colorspaces are treated as None/Linear and use a gamma of 1.0.

Texture Locator Support

See Modo ProjectionsMethods for orienting 2D texture maps onto 3D surfaces. for details.

Light Texture Support

The plugin includes basic Shader Tree texturing support for Area Lights. A single texture layer (with alpha) is supported and must be set to "Light Color" Effect. The texture's Blend Mode can also be set to multiply, and will be multiplied by the light color. It's best to set the texture locator projection type to UV Map for predictable results.

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