I have altitude, and the texture does not need to change with altitude. I will just offset the graphics up or down However, I'll need a small "independant" small graphics for the slope, one graphic for every side of the hex. I may actually need more than one, one for each altitude difference between two tiles (probably with a limit : like no more than 3 altitude difference). This is for the base altitude. I also plan to have real hill/mountain hexagon.