A unit cube

Now, let's build a unit cube in Blender.

The default scene may already have objects, including a cube, camera, and a light source, as shown earlier in the default Blender window. (Your startup settings may be different since that can be configured.)

If your startup scene does not contain a unit cube, create one, as follows:

1. Make sure that the scene is empty by deleting whatever is in it (right-click to select, X on the keyboard to delete).
2. Set the 3D cursor to the origin (0,0,0) using Shift + S (opens the Snap options list) | Cursor To Center.
3. In the left Tool Shelf panel, choose the Create tab and under Mesh select Cube to add a cube.

OK, now we're all on the same page.

Note that in Blender, the reference grid extends in the x and y axes, and z is up (unlike Unity, where the y axis is up).

Furthermore, note that the default cube in Blender has a size of (2, 2, 2). We want a unit cube sitting on the ground plane at the origin. For this, follow the following steps:

1. Open the Properties pane with the keyboard N key
2. Navigate to Transform | Scale and set X, Y, Z to (0.5, 0.5, 0.5)
3. Navigate to Transform | Location and set Z to 0.5
4. Press the N key again to hide the pane
5. You can zoom in using the scroll wheel of the mouse

For our purposes, also ensure that the current renderer is Blender Render (in the drop-down selector on the Info editor—at the top of the app window in the center).