Add texture atlas and LUT from old Ysaneya article.
Add support for the LUT and Atlas, try to implement the LUT values but produces crap.
Need to check the slop and altitude values being passed in.
Updated the testing textures.
Store and display the min/max slope and heights.
Also some hacking around with getting useful values for them.
Switch to using the pre-made LUT and Atlas textures.
Still not working correctly but getting something out of it at last.