Isosurfaces are surfaces that envelope regions of specified scalar value of a selected variable.

• Isosurfaces envelope the region less than (Below Value), equal to (Single Value) or greater than (Above Value) and also between two scalars using a Value Range.
• The shape of a given isosurface depends on the Isosurface Variable, Display Option and Value set in the Geometry Tab of Properties Panel.
• The Value of a selected isosurface can be adjusted using the slide bar at the bottom of the Geometric Entities Panel.

1. Click Create an Isosurface   in the Geometric Entities Panel. An Isosurface 01 is created under Derived Surfaces.
2. Select variable for Isosurface Variable drop-down list in the Geometry Tab of Properties Panel.
3. Select options for Option drop-down list to envelope region and set desired Value as shown in Figure 12.14.

Similar to other surfaces, such as boundaries and sections, user can view the grid, contours with the same or different variable and vectors on an Isosurface.

1. Click on the Isosurface 01 created under Derived Surfaces.
2. Select variable for Isosurface Variable drop-down list in the Geometry Tab of Properties Panel.
3. Select options for Option drop-down list to envelope region and set desired Value as shown in Figure 12.15.
4. Select Yes for Export drop-down list.
5. Select File > Save Animation.
6. Select the required result file for Isosurface data in the Select Result Files dialog box.
7. The next pop-up window appears asking the user to input a File name for the Isosurface. Select the Save as type as STL Format (*.stl).
8. Click Save.