A new method has been added when creating Spline Rectangle objects that enables the object to be created at angles other than world-aligned right angles.
Create spline rectangles with greater control using the new 3-point method.
In the viewport, create a rectangle based on three points: The first click will set the corner of the rectangle or starting point. Next, drag to define the first edge (length) and release your left mouse button to set it. Repeat the same for the the second edge (width).