How do you create a custom shader based on a relative elevation.
I want to pick a design elevation, ie 2010 and then develop a shader that will shade display increments such as -10, -8, -6 ...0,2,4,6,8, 10 feet below and above that set elevation. I want the display to shown -10 .....10 and not real elevation. I am not sure that is possible without adjusting the whole DEM down by 2010 feet to get that value to now be the 0. Thanks