Find out if a Mesh of a 3D Model was rendered successfully

Is there a way to know when the mesh of a 3D model was actually rendered?

For example if I load a big 3D Model there is sometimes a delay before it actually renders. Scripts already execute before, but I would like to wait until the Mesh was actually successfully and is visible to the camera.

This is the part that we don’t have support for for knowing without diving into the engine internals.

If you don’t need that, then as long as all the assets are available/downloaded, it will render in the same frame that it is added to the scene.