Floor plans are the document buyers return to most often after the renderings. They confirm the size of the rooms, the relationship between spaces, the way circulation flows through the plan. On a development with multiple unit types, they are what buyers use to compare options and choose.
A 2D plan communicates layout but not space. A 3D floor plan communicates both. Furniture, finishes, ceiling height, the view from one room into the next. The buyer does not have to construct the space mentally. It is already shown.
A dollhouse view adds a third dimension: the reader sees the whole plan from above at a slight angle, all rooms simultaneously, with depth and proportion readable at a glance. It is the fastest way to communicate a full floor layout to a buyer who is not trained to read architectural drawings.