Chord Count of Vault
When creating vaults, it is determined how many pieces they will be created in with the Chord Count feature. As the chord count increases, the vault lines become rounder.
Location of the Chord Count Feature
You can access the chord count feature from the general tab of the vault settings dialog.
Examples of vaults with different chord count
Chord count 25
Chord count 10
Chord count 5
Chord count 3