Let me say, that grid idea is ingenious.
It looks great so far, and I look foward to exploring it when you're done! I'm pretty impressed that you willingly took on making cliffs- it's a challenge most mapmakers (including myself) would prefer to avoid! Keep up the great work, I can't wait to see more! :D
Great progress so far! And thank you for putting up that texture, I'll definitely be using it!