Heyooo. Do you have photoshop? It's easier with it. What I did was creating huge tables of overworlds, one for each main color. Pink, Blue, Brown, Light Brown, Red and Black. Now you gotta index them, and force some skin tone colors. Voila! It's like an arithmetic mean, but with colors.
No problem. tbh I really hate cave mapping xD! I see what you mean with the stone placement. Space I really struggled with filling so I'll probably make it a fair bit smaller. because that just looks Like "Hey giant terracotta Army of policemen in a cave"
I'll get to work on it when I have the motivation. xD