Qt 3D Studio is an artist-centric tool designed for designing and building rich interactive interfaces. Though there is a strong emphasis on 3D content - all objects are placed in three dimensional space - it is not a 3D content creation tool. It is also not a drawing program, though it uses 2D images and vectors heavily. Studio is a compositing tool.
Create your 2D, 3D, and script assets in other programs and then use Studio to place them in your presentation.
For more on importing models into your project see the section Working with 3D Content.
Available under certain Qt licenses.
Find out more.