Maybe watch the movie? It answers literally all those questions.

Damnit. Now we’re never going to find out what the hell is the deal with the Mr. Ball Legs creatures...

To be perfectly honest I don’t know why either Maz or Snoke was even CGI. Nothing about their characters, either their design or their roles in the film necessitated full CGI. The CGI on Maz may have looked fine, but her design was so simple she easily could have been achieved either by makeup/prosthetics or with…