visualisation software
A company producing software for two-dimensional or three-dimensional visual representations of buildings.
A visualization software company is a firm which produces software used to produce 2D or 3D representations (renderings, videos) of buildings.
The company produces the tools used to generate building images or models. A designer making a rendering with those tools is a user of the software.
The representations can be still images or moving presentations. Software devoted solely to structural calculations or property administration has a different purpose.
