Paint laid straight from the tube
Across the whole surface, thickest on the bank and the foliage
The paint sits in thick, separate touches, what the Met calls “daubs and swirls of pigment,” squeezed on, by its account, directly from the tube. That is impasto, paint heaped so high the brush leaves standing ridges you can read as texture. It is the van-Gogh-style touch: each stroke stays visibly itself instead of blending into its neighbours, so the surface reads as built rather than smoothed.