The original version of the code would blend the colors of adjoining sections into each other as can be seen in the attached screenshot. <img width="969" alt="shark_viewer" src="https://user-images.githubusercontent.com/10181/52299996-cf18a000-2954-11e9-90ea-71171115877d.png"> The new version is no longer doing this. Most likely something in the shader has changed. <img width="669" alt="shark_viewer" src="https://user-images.githubusercontent.com/10181/52300083-fcfde480-2954-11e9-8781-5886ee5ab39f.png">