For bedroom designs that require the alteration of the physical space, such is the case when a closet or trim is added, a quick mock up in AutoCAD or SketchUp may be useful.
General education and program elective courses are required along with courses in things like fundamentals of design, basic drafting, space planning and AutoCAD.
This software is powered by AutoCAD, the design program preferred by professional interior designers, so you know this is powerful stuff.
If you have AutoCAD or a 3D rendering program like Maya or any similar blueprint making program, then your answer is yes.
You are still drawing lines, but you'll end up with a 3D frame, rather than a "stick-ship" if you use AutoCAD.