How to draw the floor in CAD

In the cad building plan, the ground is generally reserved as the background color, that is, the area defined by the wall frame is used to represent the ground, as shown in the figure.

If you want to deliberately represent the floor, you can fill the floor plane with patterns, such as AR-B8 16C? Patterns, etc. , as shown below?

? Of course, if you are in a three-dimensional view, you can also use the real material map of the floor to express it, or you can render the real effect, as shown below.

? This is a three-dimensional figure without a floor.

? This is a room with a terrace.

? Floor elevation of wood flooring materials