A 3D transform describes how an object is positioned, oriented and scaled relative to a reference frame.
Position, direction and size
The three familiar components are translation, rotation and scale, often abbreviated to TRS. Translation moves an object, rotation turns it, and scale changes its size along one or more axes. These operations can affect an entire object without changing its mesh connectivity. A transform may be stored as separate values or combined in a matrix.
The surrounding hierarchy matters
An object can inherit movement from a parent as well as have its own local transform. This is why setting a child’s rotation to zero does not necessarily make it upright in the scene. The order of operations also matters: moving a panel away from a pivot and then rotating the group produces a different result from rotating the panel around its own centre.
A sensible first check on import
When a GLB arrives in a Painta composition too large, sideways or offset, inspect its transform and its parent relationships before rebuilding the geometry. Keep dimensions, axis convention and pivot position in view together. The diagram separates the three operations so that a problem with placement is easier to distinguish from a problem with the shape itself.