I have set the "orbit style" setting to "trackball" but it only works when I use the middle mouse button to rotate the view.
The keyboard shortcut does not seems to honor the "orbit style=trackball" setting as numpad 4 / numpad 6 still uses the "turntable" style rotation, and rotate about the global Z axis.
I need to use the keyboard for rotation because I would like to constrain my 3D view rotation to one axis (vertical/horizontal only).
For example, if I
- set orbit style to trackball
- hit numpad 7 to align the 3D view to Top View
- drag middle mouse button left/right
The 3D view will rotate horizontally as desired, however if I hit numpad 4 / numpad 6 instead, it "roll" along the global Z axis
I want to have the same behavior as mouse using keyboard.
I am using Blender 2.76a.