https://ctech.com/studio_help/environment/properties-window/port-properties/red-port-properties/index.htmlRenderable Object Port Properties In Earth Volumetric Studio, a red port is a Renderable Object port. It outputs a visual object—such as a surface, a set of points, or a volume—that can be displayed in a viewer. By editing the properties of this port, you can control every aspect of how the object is visualized in the 3D scene. See the Visualization Fundamentals section for additional details on rendering options.Hugoen-us