Sounds like all you need to do is to toggle to a different viewpoint, or maybe define a new viewpoint that will show your 3D world in the orientation you want.
You can do both of these by clicking on the "Viewpoints" menu item in the Simulink 3D Animation Viewer (see below image).
In regards to information for new users, there are some tutorials available in the Simulink 3D Animation documentation. As an example, refer to this page.
I hope this helps.