Painting En Plein Air With Oils

Here are the topics we’ll be discussing:

What “Plein Air” Means


Supplies For Painting En Plein Air

Where To Paint En Plein Air

How To Paint En Plein Air

Exercise 1: Gather Up Your Plein Air Pack

Exercise 2: Find A Group

Exercise 3: Paint En Plein Air

Bonus Exercise: Make Your Own Pochade Box


Painting en plein air means you’re outside! En plein air is a French term that means “in the open air.” A lot of artists will paint landscapes outside from observation (looking at the real thing, not using a photograph as a reference). Plein air painting and drawing can be done in a variety of media—oil, acrylic, pastel, watercolor, pen and ink, etc. , but in this lesson, we’ll focus on plein air painting with oil paints.

John Singer Sargent, Claude Monet Painting by the Edge of a Wood, c 1885, oil on canvas

John Singer Sargent, Claude Monet Painting by the Edge of a Wood, c 1885, oil on canvas

Many painters count on a series of quick sketches with oil paint done plein air, before developing a final painting in their studio. Mood, color, and atmosphere can never be fully captured in a photograph the same way an artist experiences them by sitting outside really absorbing their environment. So especially for landscape painters, it is highly recommended that you build some time into your painting schedule to paint—or at least sketch—outdoors.


Before paint was manufactured and available to purchase in tubes, artists had to make their own paint. They would buy or find pigments and grind them with oil which had been heated very slowly. It was a long process and was really only possible to do in the studio. This stuff was not easily transported.

Artists eventually started to carry paints around in pig bladders that were tied at the top with string. In order to get the paint out, they would poke a small hole in the bladder and squeeze out the paint. Once air got into the bladder, it would dry out the remaining paint. Holes would clog, forcing the artist to poke even more holes. All in all, it was not a terribly effective method for keeping and carrying paints.

paint in bladder

Oil paints used to be carried around in pig bladders.


Glass syringe holding paint, c. 1840

Glass syringe holding paint, c. 1840


Sketch for metal paint tubes, patented by John Goffe Rand in 1841.

Sketch for metal paint tubes, patented by John Goffe Rand in 1841.


Screw top lid for metal paint tube patented by William Winsor (Winsor & Newton), 1842

Screw top lid for metal paint tube patented by William Winsor (Winsor & Newton), 1842

Once paint tubes were invented in the 1800’s, painting outdoors became much easier and became a trend among painters who wanted to capture natural light and outdoor scenes.

At the same time, a whole new family of more intense colors were invented. Here’s what Gamblin has to say about it:

The advancements of the Industrial Revolution of the mid-nineteenth century widened the spectrum of both color and possibilities for artists. From nineteenth century onward, pigments were no longer made specifically for artists’ use but for larger industrial coatings and printing industries. A new range of pigments were made by fusing inorganic materials, such as cadmium, cobalt, and chromium, together at very high heat. Not only did these colors brighten the urban centers of the Iron Age, but they widened painters’ access to color compared to the palettes of the Classical Era. Other inventions of the nineteenth century such as the three-roll mill and the collapsible metal paint tube gave painters the freedom to leave the confines of their studios and paint directly from nature. At the same time, photography was threatening painting’s role of reporting the visual world, and painters were revolting against the tonal traditionalists of the Parisian art academies. These factors culminated into a “perfect storm,” and the result is the oeuvre from the Impressionist movement.

For the first time in history, painters of this period had the pigments available to capture all of the colors of the natural world, expressed in the Impressionists’ interest in pure color. The denser, tubed oil colors made from brighter and opaque pigments lent themselves to the direct painting techniques so characteristic of the Impressionists.

Impressionist Palette: Cadmium Yellow Light, Cadmium Yellow Deep, Cadmium Orange, Cadmium Red Light, Alizarin Crimson, Cobalt Violet, Ultramarine Blue, Cerulean Blue, and Viridian.


The plein air technique is particularly important to The Barbizon School (French, c. 1830-1870, realistic landscape paintings) and the Impressionists (late 1800’s, looser, more focused on capturing the light than the landscape itself). Some notable plein air artists include:


Mary Cassatt, Red Poppies, c. 1880, oil on canvas

Mary Cassatt, Red Poppies, c. 1880, oil on canvas


Berthe Morisot, The Seine Below the Pont d’Lena, 1866, oil on canvas

Berthe Morisot, The Seine Below the Pont d’Lena, 1866, oil on canvas


Camille Pissarro, Springtime at Eragny (study), c. 1890, oil on canvas

Camille Pissarro, Springtime at Eragny (study), c. 1890, oil on canvas


John Constable, Seascape Study with Raincloud, c. 1827

John Constable, Seascape Study with Raincloud, c. 1827


John Singer Sargent, Landscape with Trees, Calcot-on-the-Thames, c. 1888, oil on canvas

John Singer Sargent, Landscape with Trees, Calcot-on-the-Thames, c. 1888, oil on canvas


Pierre-Auguste Renoir, Barges on the Seine, 1870, oil on canvas

Pierre-Auguste Renoir, Barges on the Seine, 1870, oil on canvas


Thomas Moran, Yellowstone Canyon, 1871, watercolor on paper

Thomas Moran, Yellowstone Canyon, 1871, watercolor on paper

Artists who painted outdoors had a big impact as well. Thomas Moran (1837-1926) was part of the survey team exploring the Yellowstone region in 1871, visually documenting over 30 different sites with watercolor sketches that would later serve as the basis for numerous paintings. These field sketches were the first color images of Yellowstone ever seen in the East. Moran’s paintings were instrumental in convincing Congress to preserve this incredible area and establish Yellowstone as the first national park.


Thomas Moran, Grand Canyon of the Yellowstone, 1872, oil on canvas

Thomas Moran, Grand Canyon of the Yellowstone, 1872, oil on canvas



Here’s a photo of some people painting en plein air:



Supplies For Painting En Plein Air

To paint outdoors using oil paints, we recommend:

  • An easel
  • Clamps (optional)
  • Palette
  • Small, folding table (optional)
  • A stool
  • Palette cups
  • A viewfinder
  • A bag to carry it all in
  • A few paints
  • 2-3 rags
  • Brushes in a roll up brush holder
  • Pencils, eraser, and a sketchbook (to try out a few thumbnail sketches before you start painting)
  • Canvas
  • Camera


If you’re going to be painting outside, you may want an easel with a top frame to hold your canvas in place in case it gets windy. This is a very typical plein air easel:


All of your paints and supplies fit in the little box behind where the painting goes and when you’re on the go looking for a good spot to paint, the whole thing folds up like a briefcase! Most plein air easels come with palettes that fit perfectly inside.


If you plan on painting outdoors a lot, you may want to invest in this sort of easel. The one caveat is that they typically don’t hold very large canvases—usually somewhere around 34” in height is the max. That’s okay though, you don’t want to be carrying around several large canvases as you paint outdoors. 16” x 20” (or somewhere around there) is typically a good size. These easels can run anywhere from about $45-$350 new. Try looking on eBay, Amazon, or Craigslist too.

The part of the easel that folds into what resembles a wooden briefcase is called a pochade, which is French for a type of sketch, usually done with oil paints outdoors. The pochade may come attached to an easel or may require a separate tripod to mount on. It’s an all-in-one box that folds out to reveal a drawer for your paints, a flat surface for your palette, cup holders for solvents, brush holders, and sometimes flat areas to store your canvases. Features will vary based on brand and amount of money you’re willing to shell out.

At, Ben Haggett custom builds pochade boxes for the dedicated plein air painter. This is his Bitterroot 10 x 12 pochade box:

pochade plein air easel

You can see all the convenient features included that will make your plein air painting experience more pleasant.

If you’re not ready to spend $300+ dollars on a plein air easel but still want to try this method of painting, you can make your own using a cigar box and some wood scraps or wine corks.


If you’re really handy, you can make your own following the plans here:

A plein air easel works best, but if you don’t have one, you can use any portable easel. If your easel doesn’t have a top bar (a repositionable bar that holds the top edge of your canvas), you’ll want to make sure you have some clamps to hold your canvas in place. If you don’t do this, a gust of wind can take your canvas to new heights, ruining all your hard work. Something like this will work as long as you clamp it to the wooden frame of your canvas and not just the canvas (it will dent your painting).


Have a few clamps in your arsenal for other things like attaching your rag to your easel so you don’t have to hold it while you paint.


If you have a plein air easel, chances are there’s already a palette in there for you to use. If, however, you’re just using a folding easel, you’ll want to bring your own palette. Palette paper is nice for plein air painting because at the end of your session, you can just fold up the paper and throw it away, instead of dealing with the hassle of scraping off your palette and cleaning it before putting it away in your bag when you go home for the day.

palette paper



If you’re using a regular easel, you’ll also want to have a portable table to set your paints and mediums on.

portable table

This folding camping table would work well. You can also make double use of a milk crate or box—use it to hold all your supplies until you get to your location then flip it over and use it as a small table.

Chair or Stool

If you’re going to sit, you’ll also need a folding chair or stool.

Folding Stool

I have seen a lot of plein air painters using a folding stool like this one. A three legged stool is fine for short stints, however if you are going to be painting for a few hours, I recommend a straight back folding camp chair.   Make sure you don’t buy the ones that are for slumping back with a cold beer. You’ll need to have a slightly straighter back, (although the drink holder can be handy to hold your water container). Depending on where you are painting, you may be able to take advantage of the resources available: ie, picnic table, beach chair and table, flat rock, beach towel.


Palette Cups

You’ll also want to make sure you have a couple of palette cups for your mediums. You can pour your mediums into these cups before you set out for a painting session, just make sure you get the palette cups with screw on lids. A mason jar works well for your solvent since it’s heavy enough to not blow over easily and has a tight-fitting lid for transportation.

palette cups


This can be as simple as your thumb and forefinger in an L shape or a piece of cardboard with a rectangle cut out in the center to help you frame your composition. If you haven’t yet read our lesson on composition, check it out now: Composition For Beginners.

finger viewfinder

viewfinder plant

There is also a very handy “3 in 1 Plus” viewfinder by Picture Perfect that has little windows that you look through proportioned to match standard size frames. It includes composition guidelines to mark the scene in thirds helping you ensure your focal point is at the “Golden Mean” (see Compositional Techniques for more info on composition).

Alternatively, you can also use the viewfinder in your camera.



Don’t forget your paints! You don’t need to bring every tube of paint you own (unless, of course, you only own a few). Try to keep your palette limited to just a few select colors. This will help harmonize your painting as well as giving you less to carry to your location.



You’ll also want a bag of some sort to carry all your supplies—backpacks work well since you can wear them comfortably while you’re walking. Wheeled shopping bags are a great option if you don’t want to carry everything.

shopping trolley rolling cart

This one is available from an office supply store for about $20:

rolling cart

You can also make a version of this by using a furniture dolly, a milk crate, and a few bungee cords.

Brushes, brush holder, and rags

A paintbrush holder like this works well and keeps your brushes from being damaged when you transport them:


Or like this one that rolls up:

brush holder-2

For instructions on how to make your own roll-up brush holder, see our Oil Paintbrushes lesson!

Bring a few more rags than you think you need. You never know when you’ll need to clean up a spill or wipe away unwanted paint on your canvas or palette.

Sketchbook, Pencils, And Eraser

Bring these items along to make thumbnail sketches of your composition before you start painting. It might seem like an extra step and I know you’re excited to get started painting, but this will save you some heartache in the end (running out of room is a really common problem when you just start winging it).


Can’t paint if you don’t have something to paint on! Don’t forget this essential item. If you have a plein air easel, check the maximum size for your canvas. Many don’t hold canvases over 36”. Small canvases are best for plein air painting so you can carry several around with you easily. 16” x 20” or less is best. Take 2-3 canvases in case you want to capture changing light or a different scene!


A regular point-and-shoot camera or high quality cell phone camera is good for this, as you can use it as a viewfinder to find and isolate interesting compositions. Take a photo of your chosen subject at the beginning of your session—you’ll be surprised at how quickly the light changes! If you love the scene because of some dramatic shadows, make sure you grab a picture of them before they change.

You’ll want to record the scene in case you want to either redo the painting at home or make some final touches a later date.

Non-Painting Related Essentials

  • Be sure to check the weather report before you go out—you don’t want to get stuck in the rain!
  • Make sure you dress the part. You may want to consider dressing in layers to account for any changes in weather. Fingerless gloves help keep your hands warm but still allow you to hold your paintbrush. A hat with a wide brim is a good idea. Since the glare of the sun can diminish the size of your pupils and distort colors, it’s critical that your eyes are shaded but sunglasses can also distort colors.
  • Bright colors (including stark white) clothing can reflect colors onto your canvas. Wear neutral beige or cream colors to avoid unwanted reflections.
  • Sunscreen/insect repellant
  • Water (don’t want to get dehydrated)
  • Tea or coffee in a thermos (if it’s cold outside); packed lunch or other snack
  • A bag for your trash


Exercise One: Gather Up Your Plein Air Pack

See what you have already in the house that will make up your plein air pack. Is there an old back pack everything will fit in? Will that old camp chair do the trick?


Where To Paint En Plein Air

Don’t think you need to trek to some exotic location in order to make a decent plein air painting. You can go to a local park, beach, or anywhere you like the scenery (don’t trespass on private property, though!). One thing you may want to consider is that people are very curious when they se plein air painters. They may want to stand and watch or talk to you while you’re working. If you’re fine with this, then set up anywhere! If you’d rather not deal with interactions with strangers watching you paint, set yourself up so that your back is covered, for instance against a wall, a closed doorway, or something else that will obstruct the path of any looky loos. If you have a back or front yard, try that first! It’s nice to try it out for the first time somewhere close to home in case you run into any issues.

Look into joining a plein air group in your community and go out with other artists! This is a great way to get inspired, discover new locations, and make new friends. Most art associations have a plein air group where informal outings are organized once a week or once a month. These people usually know excellent places to paint and sometimes make special arrangements that allow artists access to areas they wouldn’t normally be allowed to paint (private gardens, etc.)

Exercise Two: Find A Group

Research art associations in your area to find which ones offer plein air paint outings. Most organizations will let you join them a time or two before officially joining their group. Check to see what type of medium most of their members use. There are dedicated oil painting societies as well as general art groups. You can be an oil painter and still join a group of watercolorists. Artists are a friendly bunch!


How To Paint En Plein Air

So now we’ve covered your essential supplies and where to go…let’s talk about some of the techniques used in plein air painting.

Use your camera or viewfinder to find a composition you find interesting to paint. You should choose a composition that is some distance from you (40 feet or more) to help you resist the urge to focus on detail rather than the big picture.

Choose a time of day when light and shadow are clearly defined—either morning or later afternoon. If it’s noon, the sun will be straight overhead, making shadows disappear, which can result in your painting looking “flat.” The same thing applies if it’s foggy or too bright—both of which can have an effect on the outcome of your work.

Keep in mind that the light will change the longer you are outside. Shadows will be different at 10 am than that 6 pm. Work quickly, blocking in major shapes first then only getting into details at the very end. If you plan on being out for a while, you can take several canvases to work on at different times to capture the light as it is in the morning, afternoon, and evening. Claude Monet’s Haystack series is an excellent example of this. He worked on several canvases at one time, switching them as the light changed. It was also an ongoing project of his, so he captured the haystacks through seasonal changes as well.

Claude Monet, Haystack. End of Summer. Morning. 1890-91, oil on canvas

Claude Monet, Haystack. End of Summer. Morning. 1890-91, oil on canvas


Haystacks in the morning light

Claude Monet, Haystacks at Midday (Meules, milieu du jour), 1890-91, oil on canvas


Haystacks at sunset, in the snow

Claude Monet, Haystacks: Snow Effect, 1890-91, oil on canvas

Before you begin painting, squint your eyes or close one eye and squint the other. This will help you to see the big, important relationships and details will fade away. For instance, when you examine a tree this way, the individual leaves disappear and we see instead larger distinctive shapes of light and dark representing “clumps” of leaves rather than any single leaf.

When you’re ready to start painting, thin out your paints so that you work gradually from thin to thick layers (in fact, when you’re working with oil paints, you have to work this way otherwise subsequent layers won’t stick and may crack!). Save your thickest, biggest, boldest brushstrokes for the foreground. Begin blocking in the largest shapes first and work from dark to light.

Remember about perspective and how things get smaller as they recede in space. As you go back in space, reduce the size, thickness and definition of your brushstroke. With atmospheric perspective, we lose details in things that are further away from us and their colors begin to fade. Imagine a set of mountains fading away into the distance…see how colors loose their intensity the further away you are from them. Detail is most evident close up and the further away you get from the subject, the details and contrast disappear. In the far distance colors loose their warmth (no warm oranges, yellows, or reds) In fact, in the far distance only bluish colors remain; all definition fades as we near the horizon line (where the land meets the sky) until in the far distance the landscape fades into the sky and the edge between them appears to disappear.

Be as accurate with your color as possible; try not to make assumptions as to what color you THINK something is. Examine it closely—you may be surprised to find orange or bluish colors in a tree you THOUGHT was green! Or you may find yellow in a sky you thought was blue. Remember our drawing lesson Learning to Trust Your Eyes? And our painting lesson Color Illusions and Themes? Believe what you SEE, not what you think you KNOW about the color of something. You’ll be surprised at how much your brain is trying to trick you!

You can color check to see how close you’ve come to the actual color your mixing by closing one eye and holding the brush with the color you’ve mixed so that appears to be right in front of the color in the landscape. If the edge of the brush filled with color appears to disappear into the color you’re going for, you’ve got a good match! If not, it helps to hold the color you mixed right up next to the color you’re trying to match so you can more easily see what you might add to make them match.

Once you’re ready to start adding some details, open your eyes wide and look to where one shape ends and another begins, for instance, where a clump of leaves in a tree meets the sky is a spot where we might see some detail in individual leaf shapes.

Now that your painting has been worked up to a point where most of it is wet with thicker paint applications, the best strategy is to wait for it to dry a bit before you add more paint. Continuing to work it after it has reached this point can result in unintentionally muddy color and muddled, blurred brushwork. If things have gotten out of control at this point, another option is to scrape off what you’ve got and start again…you might be surprised to see the soft, blurred version of your previous painting makes a great start on the new one! It softens everything enough so you can keep and take advantage of what was good and easily repaint the parts that didn’t satisfy you. I like to say “oil painting is a good medium for people who make a lot of mistakes!” because you can always scrape down and start again, or wait for it to dry and add another layer.

Watch this quick (>5 minutes) video of artist Gregg Russell painting en plein air.

First, he’s toning his canvas with what looks like a little Yellow Ochre + Burnt Sienna mix and a bit of solvent. Just rub that onto your canvas then wipe it all off with a rag to tone your canvas so it’s not so stark white. After that, he sketches in the scene with some thinned down dark paint (use your Burnt Sienna or Burnt Umber mixed with solvent). When he begins painting, the darkest darks go in first and only at the very end does he add the lightest colors. That’s because it’s easier to make something lighter but making something darker after you’ve already added white is nearly impossible. When you’re painting outside, you’ll probably be using a lot of green. Remember that if your green is just too green, you can add a touch of red to tone it down. If you only have linseed oil in your medium arsenal, then go ahead and use that. Some plein air artists like their paints to dry a little more quickly so that things don’t get too messy, both during the painting process and in carrying it home afterwards. For that, you can use an alkyd medium such as Galkyd, Alkyd Glazing Medium, or Liquin. These mediums will still allow you to work wet-into-wet with your paints but will help speed up drying time.


Exercise Three: Paint En Plein Air

Go out and paint! Gather all the materials you will need and find a place not too far from home where you can paint. Choose a simple scene (distant hills, middle ground trees, foreground meadow) or a small piece of a more complicated view (a bloom on a cherry blossom tree against a blue sky). Remember, you don’t have to paint everything you see. Keep it simple. Don’t overthink your painting—right now, your job is to be alert and notice the things around you. You can overthink it once you get back into your studio. Set up somewhere in the shade if you can. It will keep your paints from drying out (and keep you from getting sunburned). You don’t have to finish the entire painting outside. Try to get the gist of things. You can always complete it back in your studio.

When you’ve finished your painting, send a photo to us using our Submission Form.


BONUS Exercise: Make Your Own Pochade Box

For those who enjoy plein air painting and putting things together, make your own pochade box! You will need:

  • Cigar box
  • Hot glue gun/wood glue/super glue
  • Scrap wood or wine corks
  • Masking tape
  • Thin piece of wood or plexiglass to act as your palette (if you use wood, you’ll need to give it a few coats of linseed oil to keep the paint from soaking right into the porous surface)


  • Knife hinges
  • Small hinges
  • Latch

Follow the instructions in this video:

or in this written tutorial:









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