Tried using that option. but did not give me the desired result.I forgot to mention that I am using the beta Tableau version 8.0. Not sure if that will make a difference to the output or not. I have attached the output that I get after using the Filled Map option.
I was able to produce filled maps using 8 Beta. What release of the beta are you using? I think the latest right now is 7a. If you're on the latest and it still isn't working, it might be something to report to the beta team (Beta@tableausoftware.com)