The MaterialThe representation of the surface or volume properties of an object. Layer Group node lets you add multiple Material layers to existing Octane materials, without needing a Layered material node. It can connect to the Material layer pin on existing materials.
Figure 1: Material Layer Group node
Add Layer - Adds a new Layer input to the end of the node. You can add up to eight Layer inputs to a node.
Remove Layer - Removes the last Layer input on the node.
Layer 1 - 8 - The Material layer input.