https://ctech.com/studio_help/environment/properties-window/port-properties/blue-port-properties/index.htmlField Port Properties In Earth Volumetric Studio, a blue port is a Field Port. It is the most common port type and is responsible for passing grid structures and their associated data between modules. A “field” contains the geometry (nodes and cells) as well as any data values defined on that grid, such as analytical results or material properties.Hugoen-us