Punn Wiantrakoon was a design & concept artist for Star Wars: The Clone Wars. He did character and environment modeling.
Sources
Star Wars: The Clone Wars — "Cloak of Darkness"
Star Wars: The Clone Wars — "Liberty on Ryloth"
Star Wars: The Clone Wars — "Innocents of Ryloth"
Star Wars: The Clone Wars — "Storm Over Ryloth"
Star Wars: The Clone Wars — "Blue Shadow Virus"
Star Wars: The Clone Wars — "Trespass"