How to change the orientation of a cubemap?

Hi,

if I have a cubemap texture in a material, I’d like to change its orientation, and better, being able to create material instances with custom parameters to change angles for each X,Y and Z axis. Say, in the case of an interior texture, we could choose the wall facing the viewer, or see the floor when we’re on top of a horizontal plane.

What could be the workflow to set up that? (I’m a newbie with the nodal material system)