The 3d visuals uses Java3D. It will get installed automatically the first time
you start any of the visuals. All you have to do is to choose that you accept
to run the installation program. It may take some time to download the installation files
during this installation.
If the installation do not work or you can't see the visuals, you probably don't have Java installed
or an old version.
Then go
here
to download the latest Java.