I frequently make color composites of Cassini images, and I thought it was about time I tried to explain how to do that. I've put together a tutorial on how to create RGB color images using Adobe Photoshop. Please try your hand at it -- it's a fun way to bring spacecraft images alive. I'd appreciate feedback on this tutorial -- does anything need to be explained more? Are there any missed steps or typos? -- and once the text seems to make sense, I'll try to put together the same tutorial using a free piece of software, most likely ImageJ.
At the same time that the above image of Rhea was taken with the narrow-angle camera, Cassini was also snapping away with its wide-angle camera, which has a field of view ten times as wide as the narrow-angle one. (It sees ten times more, but at ten times poorer resolution.) The color composite below was assembled by Björn Jónsson.