The Structure tab is always selectable (when a structure is loaded) and it is checked by default.

By unchecking the Structure tab, the structure disappears from the Visualization area because the display is disabled. Only the Material Legend, the Bounding Box showing the domain, and the Axes remain visible.

The same effect is achieved by unchecking through the View menu or the Visualization tab.

In the Structure tab, it is possible to switch between the three 3D Structure Renderers:

• Box: show the voxel structure rendered on the CPU.
• Smooth: smooth the voxel surfaces.
• GPU: show the voxel structure rendered on the GPU.

Alternatively, the user can switch between the three Structure Renderers through the checkboxes in the View menu (View → 3D Structure Renderer) or the Renderer pull-down menu in the Visualization Settings dialog.

If GPU is selected for Structure Renderer, the transparency functions disappear in the Structure tab, but instead in the Visualization Settings the GPU Renderer section becomes available. Three options can be chosen.

• The structure can be visualized as a Wire Frame.
• Visualize the Back Faces of the structure while the front becomes invisible.
• Checking High Quality increases the quality in trade-off to performance.

While using the Box renderer, transparency can be applied to the displayed structure by selecting Surface or Volume as the Transparency Mode, instead of the default None.

For the Smooth Renderer, transparency is applied after selecting Volume (Surface is not selectable)

For the box renderer, clicking the Transparencies’ Edit… button opens the Transparency Options dialog. Here, the user can define the transparency level for all materials in the structure. When unchecking Apply Immediately, confirm the transparency options by clicking Apply. Otherwise, they are applied automatically. Close the dialog by clicking Close. Additionally, the transparency options are also accessible through the Visualization Settings dialog.

The Transparency for the Smooth renderer is similar as for the Box renderer, but there is an essential difference: Transparency can be only applied to a single material in the displayed structure.

After selecting Volume as the Transparency Mode, select the material to which transparency is applied (Transparent Material) and the level of transparency. The smaller the value, the more transparency is applied, as shown in the example.

In this example, Material ID 00 is set to invisible, but the transparency of Material ID 01 (solid) can be defined with values between 0 and 1. The smaller the value, the more transparency is applied.

On the right side of the Structure tab and in the GUI Sidebar, Clipping of the values ClipX, ClipY, and ClipZ (or X, Y, and Z) allows cutting the displayed geometry in all three spatial directions with the sliders or by direct input.

Additionally, after defining a clipping area with the sliders or direct input, you can limit this as the area of interest by checking Invert in the View Controls or selecting Invert Clip Area for Clipping Mode in the Visualization Settings dialog. Only the area defined by the clipping values remains visible in the Visualization area.

Enabling the checkbox Use Database Colors in the Structure section of the Visualization Settings dialog sets the colors of the constituent materials according to their defined color from the GeoDict Material Database. If the material is set to Manual, the color is not changed. Changing the color afterwards disables the checkbox.

The material color can be defined in the GeoDict Material Database accessible by selecting Settings - Open & Edit Material Database from the menu bar or by clicking the corresponding icon in the toolbar. Select the material to change on the left, choose the desired color under the General tab on the right and click Save Database.