关键词: 递归

Infinite Spring - POV-Ray

Tree of Squares - POV-Ray

Sponges - POV-Ray

Tree of Squares [版本 2/4] - Povray

Tree of Squares [版本 1/4] - Povray

Tree of Squares [版本 3/4] - Povray

Infinite Spring [版本 1/2] - Povray