I wanted to work with the stained glass images I bought a while back in a Dover clip art book. I chose the one at the left, after figuring out I had to download it a a GIF and then to Grayscale, to RGB, and then to a jpg to get the size I wanted. Learned a lot right there! The primary marbling patterned used was the Italian vein, color adjusted for the different effects you will see. I used two other patterns from the papers we marbled:

Here’s the progression to the finished design.