ARC is just about the most fun a person should be allowed to have.  I have yet to have one of these that were not totally insane!  There is usually not a single architect on the committee just a bunch of know it alls that know absolutely nothing about design.  I could write entire book about this just know this you will never win.  What I am trying to say without using foul language is this; if they want it brown just make it brown.  If they want color rendering just do color rendering and don’t waste your breath trying to make them understand a single thing.  Just do what ever they ask and you not have to have a drink after every meeting?