06.01Visibility
Line of sight is used to determine visibility between models. For an observing model to have line of sight, it must be possible to draw an imaginary straight line, 1 mm wide, from any part of that model to any part of the model being observed. This line is the line of sight. While doing so, other models in the observing model’s unit and in the observed model’s unit are ignored. Other models and units can be either visible or fully visible to the observing model, as shown opposite. Note that terrain applies additional rules to visibility (13.07).