Here is a quick experiment I did a couple of days ago. I thought I'd have a go at medical representation. The image depicts red blood cells rushing through an artery.
The image was composed with a mixture of Bryce and Photoshop. The blood cell was modeled in Winds3D. I set up a scene in Bryce with a number of duplicates over a modified terrain. Finally the image was brought into photoshop where I added the distance and motion effects and other final tweaking.
I'm fairly pleased with the result. I was aiming for an image with more dynamism than the standard cover-slide images you usually see.