It consists in the creation of a 3d model using modeling software.
For our discipline the object to be modeled is usually a building, although it can also be other types of objects (furniture, stairs, etc.)
With this modeling you get a virtual model from where you can obtain plants, elevations, sections or views of the building or 3d object.
From this part of the process it is possible to obtain renderings, by means of a software of renderings and later to obtain improved images by means of another image processing software.
It is also possible to not render and obtain the image directly from the image processing software.