I have a terrain model I am trying to plot as my existing terrain that will not plot grayscale. I am referencing in the terrain model with the logical set to "Screen 1". I have my feature definition set to "Existing Ground" which is pulling from the CTDOT standard feature definitions, which I am showing in my first snip. I am thinking this is an issue with the feature definition itself, but I am not sure how to correct this issue. Does this sound like a feature definition issue? If so, how would I go into the template to correct this? If not, what could be causing this? 

When I go to the Existing Ground feature properties, the second snip is showing what is coming up.