Multi-Layered Clouds example using a single v3 cloud layer. 
This uses a base density fractal, and a base depth modulator to be used as surface layers children and breakup. This, with customize-able bottom and top falloff, can create near-perfect mocks of a default vanilla v3 cloud layer, or some interesting effects with larger, or tighter falloffs. 
The preview has post colour, leveling, fake AO, and bloom  to entice you to download.