Iridium has 6 preset styles / style variations and 18 combinations. Each preset style has 3 background styles: Simple, Medium & Full, which represent different levels of detail, making Infuse both a graphically intense, but graphically reserved template. You can edit the combinations in your template as outlined on the Style Control page.
View all styles live by appending ?tstyle=style# or &tstyle=style# to the end of your URL such as http://yoursite.com/index.php?tstyle=style4.
Below is a preview / screenshot of each style variation, in sequential order, Style 1 - Style 6. Please click on on the image to load a live example of each style variation.