Rotate Wrap
Rotate Wrap lets you rotate the texture either along the x-axis, or along the y-axis of an object.
Using:
1. Select a texture of your choice by using the Textures menu. (Paint/Textures)
2. Select an object and paint it with the texture you selected.
3. Go to the UV Map menu (Paint/UV Map), then click on the Rotate Wrap button.
4. By holding down on the left mouse button, you can rotate the wrap relative to the camera.
5. By holding down the right mouse button, you can rotate the wrap relative to the normal vector of the plane formed by the up vector and the direction vector.
6. By holding down both mouse buttons, you can rotate the position of the direction vector relative to the Up vector.