This is the last in a set of 3. For this dinosaur, I have outlined him in a turquoise and lime green opus romano, with turquoise iridio scales. However, I will be using a gray-green for the background. A buffer needs to be put in place between those colors. Hence, the light blue ceramic tile “snaking” around the dinosaur. The fancy name for the halo effect is opus vermiculatum. This method emphasizes the design, while also serving as a buffer.