While painting clouds with a filbert brush each stroke looks like a separate oval stamp. How can a soft clustered effect be created?

Correct answer: Partly overlap the oval strokes and blend selected edges with a damp brush

A cloud reads as a connected, irregular mass rather than a row of identical stamps. Partly overlapping filbert strokes and selectively softening some edges with a damp brush joins the marks while preserving variation, so C is correct. Black outlines and identical heavy marks make the shapes harder, while erasing removes the form instead of improving it.