Interface Summary Interface Description LayerLayer contains a list of children nodes that define the contents of the layer. LayerSetLayerSet defines a list of layers and a rendering order. ViewportViewport is a Grouping node that can contain most nodes. X3DLayerNodeThe X3DLayerNode abstract node type is the base node type for layer nodes. X3DViewportNodeThe X3DViewportNode abstract node type is the base node type for viewport nodes.