Color Map Dialog
Clicking the Edit… button for Color Map… in the Volume Field tab, or Open Color Map Dialog in the Visualization Settings dialog, opens the Color Map dialog to fine-tune the visualization of results. Different color maps can be chosen for volume field, arrows, schlieren, and streamlines.
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Know how! Save all color map parameters for later use in other GeoDict sessions, in a *.gps file or as start-up settings with the corresponding buttons in the bottom of the Color Map dialog. Resting the mouse pointer over an icon prompts a Tooltip showing the icon’s function.
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If Apply Immediately at the bottom right of the dialog is checked, these choices are instantly used on the display in the Visualization area, while keeping the Color Map dialog open to make other changes. Otherwise, click Apply to change the visualization settings.
Close the dialog when the visualization fits your needs by clicking 
in the upper right corner.
Create Custom Color Maps
Create different color maps in the current session for the different result fields. To do so, in the Color Map dialog enter a Name and click New Color Map in the Color Map dialog or, in the View Controls, unfold the pull-down menu for Color Map and click Add.
Edit the settings as desired, and switch between the current color maps by selecting the needed color map from the pull-down menu in the Color Map dialog, in the View Controls or through the Visualization Settings dialog of the GUI Sidebar.
Having different color maps is very useful, if different result fields should be displayed in different color styles. In the Visualization Settings dialog, for each of the result fields under Data View, find the option to select a Color Map for the corresponding result field; here shown for the Arrows.
The Color Map dialog also offers the possibility to rename or remove color maps. Simply select the respective color map and click Remove Color Map or enter a new name and click Rename.
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Value Range
Set the value range for the volume field visualization. Define lower and upper value limits and how the data range should be specified.
A color map is applied to the given Data Range. The data range can be selected in the following ways:
- Manual – allows to enter minimum and maximum values directly or move the square handles in the histogram to define upper and lower limits for the value range.
- Min/Max – the minimum and maximum values from the histogram are used.
- Extended – the minimum and maximum values are chosen to be an easy-to-read number rounded to the extended range.
- Percentiles - minimum and maximum values are computed from the field’s histogram.
If Percentiles, Min/Max or Extended is selected, the Material can be selected. Then, only the values within the chosen material(s) are considered for the histogram.
If Manual is selected for Data Range, the thresholds can also be set with the red squares in the histogram.
The histogram is displayed on the left and can be zoomed in and out with the Zoom icons. The view can be reset again with the corresponding icon  . When zooming in deeply into the histogram and then moving left or right, the resolution is not refined automatically, as it can take some time. Therefore, then click Refine View.
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Transparency
For many simulation results, it is interesting to “see-through” the volume field and to emphasize certain areas. The transparency option only has an effect on volume fields. Arrows, streamlines and schlieren cannot be visualized transparent.
For example, consider the result of a FlowDict simulation where we want to emphasize areas of fast flow.
Click Transparency in the Color Map dialog, and change the shape of the transparency curve by adding and moving new anchor points.
To add new points either left-click in the plot and click Add Point on the right or right-click in the plot and click Add Point there.
Move the points either by drag and drop or by entering the desired values for Position and Opacity for the selected point.
Observe the transparency gradient in the flow field with the following settings:
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Color
In the Color panel, control the color gradient.
Change the complete Color Space, by selecting a different option from the pull-down menu. The color space defines if and how the colors should be interpolated between two defined points, here the four options RGB, HSV, LAB and Constant are shown for the color preset Cold.
The Resolution can be set to Discrete or Continuous.
To create your own volume field colors, in the graph points can be added by left- or right-click and selecting Add Point.
The Point Color of any point can be changed by selecting the respective point and either right-click and select Change Color or on the right click Point Color...
The Position can be changed either by dragging the points left and right or by entering a position on the right.
Select between many presets by clicking Load Color Preset at the bottom of the Color Map dialog or save your own presets similar as shown for the Color & Visibility options.
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Show Isosurfaces Settings
In 3D rendering also the Isosurfaces in the Color Map dialog can be displayed, if Transparency is checked. This setting has only an effect on volume fields.
Enable Show Isosurfaces Settings and emphasize selected values in the volume field, by changing their transparency.
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Important! Note, that disabling the checkbox does only hide the isosurfaces settings in the Color Map dialog and NOT the isosurfaces in the visualization area.
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Click Add Isosurface to add a point in the graph. Move the point as desired or enter a Position. Set the Transparency and the color for the selected isosurface.
In the example, the Structure tab in the View Controls is disabled and the transparency settings are as shown above. An isosurface was added for a velocity of 0.0051 m/s and the transparency was set to 0.8. As Automatic Color is checked, the color of the value is not changed, but due to the higher transparency value, the green isosurface is emphasized.
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Important! This feature is independent from the Lines settings in the Visualization Settings dialog which are only displayed when transparency is disabled.
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