Color Vertex Attribute


The Color Vertex Attribute texture works in conjunction with the Houdini® Attribute Paint node (Figure 1). This Texture node displays vertex paint data on native OctaneRender® materials.


Figure 1: Attribute Paint data rendered with an Octane material


The Color Vertex Attribute node has one parameter for a name (Figure 2) that references the name given to the attribute that is painted in an Attribute Paint node (Figure 3).


Figure 2: The Name attribute for a Color Vertex Attribute node that is connected to the 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. input on an Octane material



Figure 3: The Attribute Paint node's Attribute Name parameter


One additional step is required in order to render the Attribute Paint data on an object in the scene. The Object Spare Parameters need to be added to the scene object (Figure 4) and the attribute name from the Attribute Paint node needs to be added to the Point Vector Attrs. parameter in the Attributes tab (Figure 5).


Figure 4: Adding the Object Spare Parameters to a scene object



Figure 5: Adding the Attribute Paint node's attribute name to the Point Vector Attrs. in the Object Spare Parameters