Creating a Wall

When trying to model something in Blender, you will find that it is often convenient to start with a simple cube and build it out from there. So that is where we will start. Follow these steps:

1. Right-click in the Outliner pane in the upper right. Choose New Collection and name it Walls.
2. In the 3D View, create a new cube (Shift + A) then rename it Wall01 in the Outliner.

   Our wall is going to be 2 m high and 2 m long, but only .5 m thick.

3. Open the Sidebar with N and set the X, Y, Z Dimensions to .5m, 2m, 2m.
4. We want the wall to rest on top of the floor and to extend from the origin. So, also in the Sidebar, set the Location to 0, 1, 1.
5. Choose Object | Set Origin | Origin to 3D Cursor. Note that we are setting the origin in the middle of the wall. Thus, when we snap it with a floor, it will overhang it by 50%.
6. Make all your transformations the default for the wall by choosing Object | Apply | All Transforms.

   You should now have this. Note the...