When I was putting in the rag rug clouds, I completely ignored the advice I normally give out to rag ruggers that you should rag rug from one point in the hessian. If you rag rug in lots of places then it weighs down the rag rug in lots of places which makes it much harder to fill in any gaps (plus makes it pretty unwieldy). If I did the rug again then I would definitely do the clouds as I reached them in the sky.