How to do procedural color like this？

[puny-d]

Hi, I am interested in generative mountain/terrain，so I hope to assign colors to each vertex， and do some stroke, maybe like this:

Any guys could give me some ideas?

[prisoner849]

Hi!
I would give noise a try:

[puny-d]

Excellent! And thanks a lot！

What really bothers me is how to make this pencil like stroke~

[prisoner849]

Try to adapt something from these examples: https://www.shadertoy.com/results?query=pencil

[puny-d]

Helpful! Thanks！

[prisoner849]

Mountains with noise strokes (to the pic provided before):

[puny-d]

Thanks！The flow of the fog is very cool！！！