Mark making with another brush: this one with bristles of two lengths.
Paper: Bockingford 190gsm CP (NOT)
Perylene Green and Indathrone Blue, painted wet in wet for the first wash.
A second wash of Indathrone Blue painted with the 2-bristle-length brush. Where the paint is wet on dry, some contouring can be implied with the direction of strokes.
Bristles of two lengths.