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home·artworks·Two birches in autumn en plein air
Two birches in autumn en plein air by Alfred Freddy Krupa

plate no. 4878

Two birches in autumn en plein air

Alfred Freddy Krupa, 1995

watercolorPost-Impressionismlandscapetreesbirchlandscapeskygrassfoliage

what to study here

It shows how three value bands, varied edge hardness, and a warm-to-cool shift can carry depth in a simple two-tree watercolor.

Study how the painter controls value to build depth with very little. The darkest darks are the navy-grey markings on the birch bark, and the lightest lights are the cream sky and white bark. The grass sits in a middle value group between them. Squint and three bands appear: light sky and bark at the top, warm mid-tone grass in the middle, and cooler, softer background trees. Edges do the rest of the work. Trunk edges are fairly sharp where white bark meets foliage and sky, and soften in shadow. Background trees lose their edges as they recede. Foliage is suggested with loose strokes that imply leaf clusters rather than describing each leaf. The grass is handled with horizontal and directional strokes that follow the ground plane. Temperature also separates planes: the foreground is warm and detailed, the distance cool and muted. The bark markings are described as a blue and raw sienna mix instead of black, applied wet or semi-dry, which keeps them in the same colour family as the rest of the picture. Copy the structure, then check where your own edges are hard and where they are soft.

key decision

The painter kept the birch trunks as the lightest forms and placed the darkest values only in the bark markings, with the grass held to a middle value. This produces the three-band value structure that gives the depth.

recreation guide

This artwork, 'Two birches in autumn en plein air' (1995), is a watercolor landscape executed in the Post-Impressionist style. As a watercolor, it relies on the transparency of pigments suspended in a water-based solution, allowing the white of the paper to serve as the light source (Source 2). The 'en plein air' designation indicates the work was likely painted outdoors to capture the specific tonal qualities, loose brushwork, and changing light conditions characteristic of landscape portraiture (Source 3). Alfred Freddy Krupa, a Croatian painter who graduated in 1995, is associated with the New Ink Art movement, suggesting a sensitivity to fluid media and line, though this specific piece utilizes traditional watercolor washes (Source 8). The composition likely features a coherent arrangement of natural scenery, specifically trees and sky, consistent with the genre's focus on depicting natural elements like weather and atmosphere (Source 4).

estimated time

4-6 hours over 1-2 sessions

materials

4 items

steps

5 in sequence

materials

itempurposemodern equivalent
Cold-pressed watercolor paperProvides appropriate texture and minimizes distortion when wet; cotton content is preferred for durability.300gsm (140lb) cold-pressed cotton watercolor paper
Professional grade watercolor paintsHigh pigment concentration allows for intensity even with large amounts of water, essential for transparency.Tube watercolors with gum arabic binder
Watercolor brushesFor applying washes and capturing loose brushwork typical of en plein air studies.Synthetic or natural hair round brushes (sizes 4-12)
Water containersFor mixing pigments and cleaning brushes.Two plastic jars

preparation

surface prep

Use high-quality watercolor paper made from linen rags or cotton, bleached by air and sunshine if possible, to avoid chemical damage to colors (Source 1). The paper should be dry and free from dampness to prevent sizing fermentation (Source 1). Cold-pressed paper is recommended for better texture and appearance (Source 2). Tape the paper to a board to keep it flat during painting.

underdrawing

Given the 'loose brushwork' and 'softness of form' associated with en plein air landscape painting (Source 3), the underdrawing should be light and minimal. Use a graphite pencil to lightly sketch the placement of the two birch trees and the horizon line. Avoid heavy lines that might show through the transparent washes.

underpainting

Watercolor technique typically involves working from light to dark, reserving the white of the paper for the lights (Source 1). There is no traditional opaque underpainting in pure watercolor; instead, begin with the lightest washes for the sky and background.

color palette

Sky Blue / Grey

Ultramarine Blue + White (reserved paper) or diluted Phthalo Blue

Sky and atmospheric background

Autumn Yellow/Orange

Cadmium Yellow + Cadmium Orange or Yellow Ochre

Birch leaves in autumn foliage

Birch Bark White/Grey

Reserved paper white + diluted Payne's Grey or Burnt Umber for shadows

Trunks of the birch trees

Earth Brown

Burnt Sienna + Burnt Umber

Ground and shadows

composition

The composition should arrange the elements (two birch trees, sky, ground) into a coherent whole (Source 4). As an en plein air work, it likely captures a specific view with attention to weather and light (Source 3). The sky is almost always included in landscape views (Source 4). The arrangement should feel natural rather than predetermined by academic rules (Source 3).

step by step

underdrawing→first pass→refining→finishing

underdrawing

  1. step 01

    Lightly sketch the two birch trees and the horizon line on the prepared paper. Keep lines faint to avoid interfering with transparency.

    Tip — Ensure the paper is securely taped down.

    Pencil sketch

first pass

  1. step 02

    Apply a wet-on-wet wash for the sky and distant background. Use diluted pigments to create soft transitions, capturing the 'softness of form' typical of plein air studies.

    Tip — Work quickly before the paint dries to maintain fluidity.

    Wet-on-wet wash

  2. step 03

    While the background is still damp or just after it dries, apply the first layer of color to the birch leaves. Use transparent washes to build up the autumn colors.

    Tip — Reserve the white of the paper for the brightest highlights on the leaves and bark.

    Transparent wash

refining

  1. step 04

    Add darker values to define the tree trunks and shadows. Use loose brushwork to suggest the texture of the bark and foliage without over-detailing.

    Tip — Avoid overworking the paint; let the paper show through for luminosity.

    Loose brushwork

finishing

  1. step 05

    Add final details and deepen shadows if necessary. Ensure the overall tonal qualities reflect the outdoor light conditions.

    Tip — Check the balance between light and dark areas.

    Glazing

critical techniques

Transparency

The main characteristic of watercolors, caused by the gum binder being absorbed by the paper, leaving pigment particles through which the paper shimmers (Source 2).

En Plein Air Observation

Painting outdoors to capture changing details of weather and light, resulting in loose brushwork and tonal qualities (Source 3).

Reserving Lights

In traditional watercolor, the paper is reserved for the lights, rather than painting white over dark areas (Source 1).

common pitfalls

  • →Using paper that has suffered from dampness, which causes sizing to ferment and decompose, leading to stains (Source 1).
  • →Overworking the paint, which can destroy the transparency and luminosity of the watercolor (Source 2).
  • →Using chemical bleaches on paper, which can be destructive to the colors (Source 1).
  • →Creating a predetermined look rather than capturing the natural light and weather conditions (Source 3).

what the sources don't tell us

Where the corpus is silent, we say so rather than guess. These are the gaps a complete recreation guide would normally cover that our source passages don't.

  • ·Specific color choices for Alfred Freddy Krupa's 1995 palette are not detailed in the sources; general autumn landscape colors are inferred.
  • ·Exact compositional layout of the two birch trees (e.g., left/right placement, height ratio) is not described in the sources.
  • ·Specific brush types preferred by Krupa are not mentioned; general watercolor brushes are recommended.
  • ·Whether Krupa used opaque watercolor techniques (like Chinese white) in this specific piece is unknown, though the style is Post-Impressionist which may allow for it (Source 2).

grounded in

The technical procedure in this guide traces to the following classical art-instruction texts.

  • The Science of Painting↗

    • CHAPTER XIII. WATER COLOURS — applied to Paper preparation, transparency, and reserving lights

cross-referenced from

Named facts about this artwork and artist were checked against these reference pages.

  • Wikipedia: Watercolor painting↗

    • Watercolor painting — part 1 — applied to Materials, transparency, and pigment concentration
  • Wikipedia: En plein air↗

    • En plein air — part 1 — applied to Outdoor painting technique, loose brushwork, and capturing light
  • Wikipedia: Landscape painting↗

    • Landscape painting — part 1 — applied to Composition and inclusion of sky/weather
  • Wikipedia bio — Alfred Freddy Krupa↗

    • Alfred Freddy Krupa — part 1 — applied to Artist context and graduation year

Read more about the corpus on the sources page and how the guides are built on the methods page.

read from the painting

observed from the image, not the label
6 dominant colors, measured

what the eye sees

Two tall birch trunks dominate the foreground, positioned nearly vertical with their characteristic white bark and dark markings rendered crisply. Light diffuses from above through an overcast sky, creating soft shadows in the golden-green grass and illuminating the tree bark from a slightly oblique angle. The eye lands immediately on the bright birches, then travels back through warmer yellow-toned grasses to silhouetted trees in the middle distance and a hazy treeline beyond. The composition creates strong atmospheric perspective—the foreground is warmly lit and detailed, while background trees fade into cool, muted tones.

value structure

The darkest darks are the birch bark markings (navy-grey lenticels and shadow lines), the lightest lights are the cream sky and white birch bark. A distinct middle value group occupies the grass—warm yellowy-greens sitting halfway between the bright trunks and the pale sky. When squinting, three clear bands emerge: light sky-and-bark at top, warm mid-tone grass in the middle ground, and cooler-softer background trees. This value structure is what gives the painting depth.

observed palette and mixes

  • #e3dfcd

    Titanium White + touch of Raw Sienna

    Sky base and birch bark highlights—the palest wash

  • #ddd9c6

    Titanium White + Raw Sienna + touch of Cerulean

    Softened sky areas and transition zones

  • #c0c296

    Cadmium Yellow + Cerulean + touch of Raw Sienna

    Foreground grass, warm yellowish-green

  • #b0bd89

    Cadmium Yellow + Viridian + Raw Sienna

    Mid-tone grass and meadow areas

  • #9ca174

    Viridian + Raw Sienna + touch of Prussian Blue

    Foliage shadows and muted background greens

  • #4a5a7a

    Prussian Blue + Raw Sienna

    Birch bark markings and trunk shadow lines—applied wet or semi-dry

edges and brushwork

Birch trunk edges are relatively sharp where the white bark meets foliage and sky, but they soften slightly in shadow areas—not uniform hardness. Foliage is rendered impressionistically: individual brushstrokes suggest leaf clusters and branch directions rather than defining each element. Background trees blur and lose edge definition with atmospheric perspective. The grass is handled loosely with horizontal and directional strokes that follow the ground plane, creating movement without fussiness.

a working sequence

  1. 01

    Establish sky and overall light wash

    Lay down a very pale, wet wash of cream (white + touch of raw sienna + hint of blue) across the top half, letting it fade gently into the paper. This sets your lightest light and establishes the overcast quality. Work quickly and leave it luminous—don't overwork.

  2. 02

    Block in grass and light ground plane

    While the sky is still damp, drop in a pale yellow-green (cadmium yellow + cerulean + raw sienna) across the lower half. Let colors mingle softly at the horizon. Keep this wash thin and light enough to feel recessive.

  3. 03

    Establish birch trunk shapes

    With a very light wash of pale cream (almost white, just enough pigment to see it), block in the two vertical birch trunk forms. They should read as the lightest elements already. Leave the paper showing through in places to preserve luminosity.

  4. 04

    Layer foliage and mid-tone greens

    Build up the foliage masses with yellow-greens and olive-greens in the middle ground and around the birches. Keep individual brush marks loose and gestural—suggest leaf clusters with dabs and dabbing strokes, not precise rendering. The foliage should sit behind the bright trunks in value.

  5. 05

    Deepen grass and create shadow shapes

    Warm up and deepen the grass where shadows fall (around the birch bases, in the foreground). Use a mix of cadmium yellow + viridian + raw sienna. Leave the brightest areas of grass still pale to show where light hits the ground.

  6. 06

    Add background trees and atmospheric recession

    Suggest distant trees on the left (warmer, more golden) and right (cooler, more muted). Make them significantly lighter and less detailed than the foreground birches. A small warm silhouette on the left middle distance adds depth by contrast.

  7. 07

    Define birch bark markings and lenticels

    With a mix of prussian blue + raw sienna (not pure black), paint the characteristic dark spots and streaks on the birch trunks. Use a smaller brush and work with a semi-dry technique for crisp marks. Don't make them uniform—vary their size, spacing, and intensity. Place darker shadow lines on one side of each trunk to suggest roundness.

  8. 08

    Final refinement and atmosphere

    Step back and squint. Add any final shadow accents where foliage overlaps or where the grass meets the trunks. Suggest a few distant branches with fine lines. The birches should feel luminous and forward; background should feel soft and recessive. Resist the urge to detail everything—the painting's strength is its restraint.

where studies of this painting go wrong

  • Making the birch trunks too dark or too yellow—they must remain cream and white to read as birches, even in shadow. The markings do the work, not dark bark.
  • Over-mixing greens or making them too saturated, which muddies the fresh, luminous quality. Keep greens slightly muted and allow transparent layering to build depth.
  • Overworking the foliage with too much detail or too many hard edges. Impressionistic suggestion reads better than botanical accuracy at this stage.
  • Pushing background trees too dark or too warm, which flattens the space. They must remain lighter and cooler than foreground elements to recede properly.
  • Making the grass uniform in value or color. The grass needs variation in warmth (yellower in light, greener in shadow) and value to feel like actual ground.

measured difficulty

beginner friendliness
value contrast
palette complexity
compositional simplicity
brushwork visibility

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