How to Convert a 2D Model to 3D Using AutoCAD. Use AutoCAD's "Extrude" and "Revolve" commands to turn 2-D designs into 3-D models.

Using the split function in 3D builder you can slice a model into a number of smaller parts along certain planes or axis to reduce the need for support or to eliminate overhangs.

Before you go to the hardware store — or book a contractor — you can use software like free floor-plan apps and augmented-reality tools to sketch out ideas for your remodeling projects.