Automatic Segmentation

Click on Create New Mask and choose Automatic Segmentation. All the parts you will choose will be segmented as one part, so if you want to segment different parts you should select each one separately in a different operation.

Editing Masks and Generating Surfaces

After creating the mask, you can edit it by clicking on its card . Use the selection tool you need to crop unnecessary areas. The brush tool allows you to draw even in cross sections.

After you finish editing click on the mask card to generate a surface from the mask.