It is located in the "Rooms" section. Add it to your project, click twice and set the desired dimensions on the panel on the left.
You can rotate the cube around its own axis with the arrow, which appears when you click on an object and for which you can draw it, and when You click on the "Shift" and on this arrow, the cube will "bend".
What can You do with a Magic Cube? Whatever You like: realize the levels of the ceiling, make walls of different thickness, steps, ledges from above, a flat roof and even a triangular house.
In this section, You can share your ideas, pictures or instructions that You yourself made with the help of a Magic Cube.
One of the ways to use a cube is to build different types of roofs.