Checking the Bone Threshold
Using the correct bone threshold is critical to obtain a clear model. The optimal value is required to transfer the essential information on the patient and surgery models.
To adjust the threshold:
Drag the Bone threshold slider at the bottom to the left or the right until the desired threshold is reached. The model is adjusted accordingly.
Type the desired isovalue in the Bone threshold box.
Revert to the initial isovalue using the reset icon 
.
Tip
The bone threshold for the patient model can be edited anytime with the 
Edit Thresholds action in the Home menu.