I still play Runescape 3 and they are updating from a java client to c++ soon, which will really improve the graphics.
Current - https://gyazo.com/5f43a0dd0531b0a4cfbf5d6bdbf3ea6f
New client - http://i.imgur.com/hcldu73.jpg
The new client is estimated Beta in a few months with a full release near the end of the year.