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Orienting faces

To orient faces consistenly:

  1. Select from the menu Tools > Orient faces

This initiates a scan of the faces, flipping faces until the orientation of every face agrees with its neighbour (if this is possible). The scan is performed in the background and may take a few seconds or longer for a large mesh. You can tell the scan is complete when the statement "Orient faces..." vanishes from the lower left of the model view window.