I haven't spent much time playing with my Gelli Plate, but I saw this video on YouTube on using Texture Fades (embossing folders) with the Gelli Plate. Watch the video!!!!
I brayered green acrylic paint on the Gelli Plate and pressed two embossing folders into the paint and ran the brayer over them.The paper on the left is the first paper I pressed onto the Gelli Plate and ran the brayer over it. The paper on the right is the second paper (often called the "ghost sheet").
Brayered red on the Gelli Plate and place down these two embossing folders.
Gelli Arts Blog.