I want to render a surface made up of several triangular facets accoring to the height information. In grey shade this is easy as all I do is to specify the intensity by factoring the height information. Thus going around each side I simply use the commands
Is there a way of altering the color index so that I can achieve a colour contour using the same principle as above. If I try to specify red for one vertex and then blue for the adjacent vertex, then I would like to control the transition colours in between.