Curl figure is relatively common and it is related to a wavy fiber pattern, either from side to side of the surface, or in and out of it. Below some examples.
Maple, European (curly) (from Seralvo)- PZC = 14.2Pear (curly) (from [Source 4])- PZC = 9.1Purpleheart (curly) (from [Source 20])- PZC = 11.1Walnut, European (curly) (from Seralvo)- PZC = 13.9Aniegre (curly) (from Evolution Panels and Doors)- PZC = 14.9Movingui (curly) (from [Source 28])- PZC = 15.9Eucalyptus (curly) (from John Fairweather)- PZC = 16.9Maple, Hard (curly) (from [Source 4])- PZC = 13.9Etimoe (curly) (from P. Hinds)- PZC = 18.5Aniegre (curly) (from P. Hinds)- PZC = 12.0Ash, American White (curly) (from P. Hinds)- PZC = 10.4Olive (curly) (from [Source 25])- PZC = 6.0Ash, Olive (curly) (from Evolution Panels and Doors)- PZC = 13.1Koa (curly) (from anonimous supporter from Hawaii)- PZC = 26.4Limba, Black (curly) (from [Source 28])- PZC = 21.9Maple, European (curly) (from P. Hinds)- PZC = 12.8Paldao (curly) (from P. Hinds)- PZC = 18.4Canarywood (curly) (from NEHOSOC)- PZC = 18.6Cypress, Mediterranean (curly) (from [Source 24])- PZC = 8.5