3D Walkthrough is provide a service of architecture that process is done by architecture firms and exterior design is just process which is run by staff of company. Architecture firms and exterior design are different as compare between them but architecture is more than just exterior design because many services of architecture provide by them and that work in bunch of different types like many services that provide to people.
Huge project will be easily done by the architecture firms because they have many employee and staff that complete in the few time. An architecture firm usually has at least one “principal,” a licensed architect who is the sole proprietor of the firm, or one who shares an ownership interest with the other architects in the firm (either as a partner in a partnership, or as a shareholder in a corporation).
Sometimes the title of principal is limited to owners who hold a certain percentage of ownership interest in a firm, or it may be expanded to include anyone with a leadership role in a firm. Some firms may also use the title “principal-in-charge,” which denotes an architect who oversees the firm’s services in connection with a specific project.
In exterior designing, editor have to only design the exterior of architecture that many designs done by the designers and they doing amazing job but exterior design provides only designs of exterior of architecture that is only one service and its very less as compare to architecture firms. Architecture firms provide all services including exterior design service. It just type of the hub of providing services to people and that done with their staff.