Culling Tab

Use this tab to adjust geometry culling in the opened Autodesk Navisworks file.

Note: The Clipping Planes and Backface options are only available for 3D models.

Area

Enable

Specifies whether or not area culling is used.

Number of Pixels Below Which Objects Are Culled

Specifies a value for the screen area in pixels below which objects are culled. For example, setting the value to 100 pixels means that any object within the model that would be drawn less than 10x10 pixels in size are discarded.

Clipping Planes

Near

Automatic

Select this radio button to make Autodesk Navisworks automatically control the near clip plane position to give you the best view of the model. The Distance box becomes unavailable.

Constrained

Select this radio button to constrain the near clipping plane to the value set in the Distance box.

Autodesk Navisworks uses the provided value unless doing so affects performance (for example, makes the whole model invisible), in which case it adjusts the near clip plane position as necessary.

Fixed

Select this radio button to set the near clipping plane to the value provided in the Distance box.

Distance

Specifies the farthest distance between the camera and the near clipping plane position in constrained mode.

Specifies the exact distance between the camera and the near clipping plane position in fixed mode.

Note: Nothing is drawn between the camera and the near clipping plane; when you override automatic mode, make this value small enough to display your data. Also, overriding automatic mode with values under 1 can produce unpredictable results.

Far

Automatic

Select this radio button to make Autodesk Navisworks automatically control the far clipping plane position to give you the best view of the model. The Distance box becomes unavailable.

Constrained

Select this radio button to constrain the far clipping plane to the value set in the Distance box.

Autodesk Navisworks uses the provided value unless doing so affects performance (for example, makes the whole model invisible), in which case it adjusts the far clip plane position as necessary.

Fixed

Select this radio button to set the far clipping plane to the value provided in the Distance box.

Distance

Specifies the closest distance between the camera and the far clipping plane position in constrained mode.

Specifies the exact distance between the camera and the far clipping plane position in fixed mode.

Note: Nothing is drawn beyond this plane; when you override automatic mode, make this value large enough to include your data. Additionally, using the ratio of the far clipping plane to near clipping plane in excess of 10000 can produce unwanted effects.

Backface

Turns on backface culling for all objects. Select from the following options:

• Off. Turns off backface culling.
• Solid. Turns on backface culling for solid objects only. This is the default option.
• On. Turns on backface culling for all objects.

Tip: If you can see through some objects, or some object parts are missing, turn off backface culling.

Tip: If you want to restore the default values, click the Reset to Defaults button.