| InnerWorld has a graph base approach
          for generating terrains. You produce the mesh by building
          an acyclic graph to evaluate the height of every mesh
          point. There are different types of nodes: data sources,
          operators, and data sinks. A graph needs exactly one sink
          connected to one ore more sources to produce a mesh. Simple step by step example 
            Move the cursor over the free
            space in the InnerWorld window.Press SPACE and
            select "Source" and than "Radial Gradient" to insert
            the first node. 
 
            Move the cursor a little bit right
            to the free space.Press SPACE again
            and select "Sink" and than "Mesh" to insert a second
            node.Drag the left mouse
            button LMB from the source node to the
            sink node. 
 Adjusting a node parameters Click on the source node with the
          right mouse button RMB . The nodes
          parameter will be shown in the parameter area. What you
          see are typical Blender buttons. You can edit the values
          to adjust your mesh. Some simple type of nodes have no
          parameters. In this case only the node type is
          displayed. 
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