AbstractHairisoneofthecrucialelementsinrepresentingbelievabledigi-talhumans.Itisoneofthemostchallengingelements,too,duetothelargenumberofhairsonahumanhead,theirlength,andtheircomplexinteractions.Hairappearance,inrenderingandsimula-tion,isdominatedbycollectiveproperties,