Stippling could be a good technique to use as it allows for strong tonal work whilst still keeping simplicity.
Did you ever see something more beautiful ???
Wild Horses in The Morning Mist
simple tumblr watercolor - Google Search
I’ve got dreams that keep me up in the dead of night — Needtobreathe
Art Print Koi Fish Watercolor Painting by BethanyEdenArt on Etsy
Double exposure alternative Sean
Double Exposure Animals