Finally I finished graphic pack for volcanic terrain. It took me one month to draw it, but I think it was well spent time. It has lots of lava, "hot" stones, burned trees, and of course lots of gems to mine. You may also encounter here special "enemies", like boiling lava or burned angry Ent. You will need to keep you eye on each of your miner very carefully here as they can lost they life in no time in this unfriendly world.
Below you will find two screenshots - you can find more on game websites provided on project description section.
I really like what I did here - hope you also will.