
This process shows a method for depicting trees when you want your foliage and branches unified as one.
It’s the effect we generally get when looking towards the light. You’ll see less ‘internal’ detail and variation of tone and colour. Things become silhouetted and it’s more the outside edges of shapes that define them.
For more on artistic techniques, see our tutorials on how to draw a cat and how to create a colour chart and avoid mixing muddy colours.