For the Radio Screen, we currently offer you the option to show a visualizer or to show album art based on the metadata of your stream.
In order to disable the Visualizer, open MediaFragment.java and set the boolean VISUALIZER_ENABLED as shown below:
private boolean VISUALIZER_ENABLED = false;
When the visualizer is disabled, we'll show album art instead automatically.
Ofcourse, you're always free to customize the Radio screen beyond these options. For example with your own imagery or layouts. But please keep in mind these customizations aren't covered by our documentation or support. Thank you.