Indicates if the Sprite is rotated when packed to SpriteAtlas.
| None | Sprite is not rotated when packed to SpriteAtlas. |
| FlipHorizontal | Sprite is flipped horizontally when packed to SpriteAtlas. |
| FlipVertical | Sprite is flipped vertically when packed to SpriteAtlas. |
| Rotate180 | Sprite is rotated 180 degrees when packed to SpriteAtlas. |