Sliver Face Checking computes a ratio of perimeter length to area for each face. This is known as the sliver factor. Faces with a high sliver factor can result in a poor quality surface mesh. The sliver factor associated with a face is computed as:

The table below shows some examples of sliver factors that would be computed.

When the Sliver Face Check is run, faces with a sliver factor greater than the limit set will be identified as potential sliver surfaces. The default value of 25 is usually sensible. Each face identified will be highlighted when the individual warning message is selected.

Sliver Face Checking is one of the checks performed when using the Geometry Checking feature. You can change the limit used for the check by using Verify Options. The Sliver Factor Limit must be greater than 1.0.

Faces identified that possess an unacceptable sliver factor may be removed by merging them with neighboring faces. More details of this process can be found in Virtual Faces.