Some apps provide a split-screen view between the 2D floor plan and a 3D model that you can spin and rotate. Other programs display the project in the flat 2D view and you add the extra dimension ...

If you're new to 3D modelling and are using the browser apps on this list, then you can also visit sites like TurboSquid to sell or buy models. Similarly, visit 3D Warehouse.

Basically, the app uses your iPad to take a series of pictures of an object, and then assembles those pictures into a "rotatable" model, essentially faking 3D (sort of similar to those old shots ...

As an example of how to do things well, look at how Catrina Lee, a 14-year-old student at My ArchiSchool, presents a 3D model on her presentation slides. Stay tuned to this channel. Our next ...