Render layers allow users to separate their scene geometry into parts, where one part is meant to be visible and the rest of the other parts “capture” the side effects of the visible geometry on it. The layers allow different objects to be rendered into separate images where in turn some normal render passes may be applied. The rendered images from each layer can then be recombined in compositing software such as the Foundry’s Nuke or Adobe After Effects.
To set up a scene for rendering in layers, assign an Octane Layer ID for respective objects in the scene. The object's’ geometry type has to be set to be “movable proxy” or “reshapable proxy” , this option is found in the shape node of each object. Figure 1 shows the location of these objects in the attribute editor for the object’s shape node.
Figure 1: The Layer ID option is found in the Object’s Attribute Editor
Enable the Render Layers feature through the Render Settings -> OctaneRender Settings tab (Figure 2). When the Object Layer IDs has been set correctly for each object, Octane will render separate passes with only those objects that share an ID.
Figure 2: Enable Layers option in the Render Setting window.