Changing Terran Titleset

[baozilla]

I am making a single player rpg map, and i finished the above-ground part of the map. Now i want to make the underground part on the same map, but i cant find the right Terran Texture.

so my question is, how can i add new terran textures?

 

[Ghan]

Advanced -> Modify Tileset

 

[baozilla]

you are always the first to reply my post... XD
thx again~