Schlieren (Line Integral Convolution (LIC)) is another option to visualize a fluid flow field computed in FlowDict, AddiDict or FilterDict. LICs are visually displayed as distorted striations or streaks in 2D sections that represent fluid motion through the 3D flow field, in any of the three directions.

The parameters that control the visualization of the Schlieren in 2D are under the Schlieren tab of the View Controls and, with a few more choices, in the GUI Sidebar under the Data View u Schlieren tree as well.

The Flow pull-down menu shows one choice for each loaded vector field. For a flow field for example, only the field Velocity is available. The Schlieren are computed from the selected field.

The Direction is only available for 3D view. In 2D the Schlieren are always visualized for the current view and slice.

Define the Length, Resolution and Type of the Schlieren and decide if they should be Normalized and / or Colorized as described for the 3D view.

The Clipping works similar as for the structure.