A presentation may use a model to explain a shape that cannot be understood from one angle. Before sending the deck, identify whether the recipient needs the model’s three-dimensional behaviour or only a carefully chosen static view. Those are different deliverables.

Write down the feature the audience must understand, such as an opening on the back or the relationship between two surfaces. Keep that requirement beside the slide so a successful file export is not mistaken for a successful explanation.

Current Keynote on Mac accepts USDA, USDC and USDZ models. Insert one through Insert Media, Choose File, or drag it onto the slide. Its rotation controls adjust the x, y and z axes. A Play control is available when the model contains an embedded animation; not every model necessarily has one.

Apple states that 3D objects appear as 2D objects when the presentation is exported to another file format or opened in Keynote 13.1 or earlier, Keynote for iCloud, or Preview. Treat those destinations as a change in the content’s capabilities, even if the slide still looks attractive.

Choose a useful fallback view

In the editable source, orient the model so the important feature is visible. Compare the view with the written requirement. If one angle conceals essential information, prepare additional clearly labelled views or another suitable explanation instead of assuming the recipient can rotate the delivered result.

If embedded motion matters, watch the complete sequence in the intended presenting environment. Check that it actually demonstrates the feature you need rather than merely making the object move. A model file’s animation is not evidence about the correctness of the represented design.

Create a sample using the real delivery route and inspect it in the recipient’s intended application. Look specifically for the feature that required three dimensions. Record whether the result is a static representation and whether the accompanying text remains meaningful in that form.

Preserve the editable presentation

Keep the original deck and model source information separately from the issued copy. Label the handover accurately so someone does not expect model behaviour from a static export. If continued 3D use is essential, agree on a compatible viewing workflow and verify it with the sample before distributing the complete presentation. The acceptance question is whether the recipient can understand the model’s important feature in the environment they will actually use.

Reference: Apple: 3D objects in Keynote.