Chain of Challenges, episode 23.
Draw two 64x200 horizontal landscapes (one above the other on one 200x128 canvas). The topic of the first one is completely open. The second one should be exactly the same landscape, but after a cataclysm or apocalypse, may it be the result of a zombie virus outbreak, a nuclear war, global warming, or an ice age. The time gap doesn't matter, it may be millions of years or just a decade. The most important thing is devastation or any other types of visible change as a result of human activity or the power of nature.
You have to use the Nature-20 Palette by Orbitron.
The challenge thread will have all the challenge updates. The thread is also a great place to post your WIPs.