This command automates the process of organizing UV Islands. UV islands are continuous areas of polygons in UV space that are disconnected from any other UV data. This is a common occurrence in Atlas mapped UV sets as well as UV unwrapped data that was accomplished by isolating areas of the mesh for focused unrwaps.
The Orient Pieces command has a single pop-up choice for chosing the Direction of to orient each island. The options are Auto, Horizontal and Perpindicular. The default, Auto, will automatically rotate the pieces in either direction according to which organization creates the algorithically optimal layout. Horizontal will force the islands into a more horizontal orientation based on the lengths of the islands and Perpendicular will force the islands in an orientation that is perpendicular to the Horizontal method.
