Hello,

The Qt 6.9 documentation for QQuick3DModel states:

Mesh format and built-in primitives

The model can load static meshes from storage or one of the built-in primitive types. The mesh format used is a run-time format that's native to the engine, but additional formats are supported through the asset import tool Balsam.

The built-in primitives can be loaded by setting the source property to one of these values: #Rectangle, #Sphere, #Cube, #Cylinder or #Cone.

It would be nice to have some detail about units for each primitive. For example, Cube and Sphere are 100 units wide but users have to discover it by themselves.

Thank you and have a nice day.