Here is the TGD file for my Saturn image. I'm sorry it took me so long, I forgot about it as finals kicked me in the face haha. There are notes in the file about all the steps I used to create the ring transparency. The image maps used for creating the main ring's color and alpha mask are not included since they are about a combined 20 Mb and took me quite some time to make. Replacement images can be made easily enough using Photoshop or GIMP and tailored to your particular scene. If anybody has any questions that the TGD doesn't answer, ask away. Thanks for taking a look.