Conversion Nodes allow for floating point data, such as the rotation values of a camera, to drive the color value of a material. As there is no direct representation of scene objects in the Octane Node Editor, it is necessary to use Set Driver and Set Driven to make the connection to these nodes (Set Driver and Set Driven will create an XPresso node which can then be further modified using the standard Cinema 4D XPresso environment.) This is discussed in detail here.


Conversion Node Types

The following conversion nodes are available in Octane Node Editor > Custom Texture:


    • Float to Greyscale — Takes a single float input and converts into a greyscale texture input. The node has a single slider for a greyscale value from zero to one value. This value can also be driven by expressions.
    • Floats to Color  —  Takes three separate float values as inputs and converts to an RGB value. The node has three sliders, one for each RGB color component, built in for direct input, or the individual components can be driven via expressions.
    • Float3 to Color — takes a 3 dimensional value input and converts it to an RGB color. There is a direct input in the node itself, or you can connect the Value to a scene item driver using Set Driver/Set Driven.
    • Volume to Texture — Takes an external VDB grid to and converts to an RGB texture. There are inputs for a Transform and a Projection node and an option to select one of several Grid IDs. 
      • VDB File — Assign the VDB file in this location.
      • Animation — This section contains the animation information control for the loaded VDB grid. More information here.
      • Transform — Transforms, scales and rotates the volume texture, typically by connecting a Transform node to this pin. 
      • Projection — The projection method used to assign the volume texture to the object.
      • Grid ID — Choose the desired volume appearance from the following options:
        • Scatter — The portion of the grid used for lighter colored smoke.
        • Absorption — Typically the density portion of the grid, often used for darker smoke.
        • Emission — The luminant emission grid, typically temperature.
        • Velocity.x — The velocity of motion on the x axis.
        • Velocity.y — The velocity of motion on the y axis.
        • Velocity.z — The velocity of motion on the z axis.