It might not be as neat as some other projects in this board, but I finally managed to dump the tile-height data of the Runescape cache :p
When I figured out how to get this data, I quickly wrote a small script to make Unity spit out a terrain with the provided height data.
Next up are the actual tile types and hopefully also object loading.
When this is done, I'm going to make this into a small Virtual Reality project where you can just roam Runescape using a cardboard device!
Older images-- Update 20/05/2016 --