Fireflies in a Mason Jar-Full Acrylic Painting Blog Tutorial

There’s something so peaceful about a summer evening filled with fireflies. The warm air, the sound of crickets, glowing little lights floating through the dark… it feels simple and magical at the same time. This week’s Wednesday Paint Tutorial was inspired by those quiet moments outside at dusk when everything slows down and the world feels calm for a little while.

The best part about this painting is that it’s beginner friendly while still looking beautiful and impressive. Most of the magic comes from soft blending, glowing colors, and simple shapes instead of tiny detailed painting.

So grab your paints, relax, and let’s create a little summer night magic together.

Supplies You’ll Need

Canvas

16 x 20 stretched canvas

This size gives enough room for blending skies and adding glowing fireflies without feeling crowded.

Acrylic Paint Colors

Titanium White

Cadmium Yellow Light

Cadmium Yellow Medium

Naples Yellow

Burnt Sienna

Raw Umber

Sap Green

Hooker’s Green

Ultramarine Blue

Cerulean Blue

Dioxazine Purple

Quinacridone Magenta

Lamp Black

Brushes

1/2" Flat Brush

Filbert Brush (Size 6)

Round Brushes (Size 2 & 6)

Small Detail Brush (Size 1)

Before You Start

This painting works best when you:

work from dark colors to light colors

let layers dry before adding highlights

keep your brush strokes loose

Do not worry about perfection.

The soft glowy look is what makes this painting beautiful — not tiny perfect details.

And remember: Every firefly can be different sizes and brightness levels. That actually makes the painting feel more natural and magical.

Step 1 — Paint the Sky Background

Using your flat brush:

Paint the top of the canvas with Ultramarine Blue.

As you move downward:

Blend in Dioxazine Purple

Then Quinacridone Magenta

Add soft orange/yellow near the horizon

Blend horizontally using soft strokes.

This creates that glowing summer sunset fading into night.

Beginner Tip:

Do not overblend the colors. Slight color variation makes skies look prettier and more realistic.

Step 2 — Add the Distant Land

Mix:

Ultramarine Blue

Black

Tiny touch of green

Paint a simple uneven tree line across the horizon.

Do not add details.

Think of it as a silhouette shape instead of individual trees.

Keeping this section simple helps the glowing fireflies stand out more.

Step 3 — Paint the Grass Silhouettes

Using black mixed with a little green:

Paint tall grass on both sides of the canvas.

Use long upward brush strokes.

Some grass can lean slightly.

Some can be taller than others.

The unevenness makes it feel natural and relaxed.

Step 4 — Paint the Wooden Table

Mix:

Raw Umber

Burnt Sienna

Tiny touch of black

Paint horizontal wood strokes across the bottom portion of the canvas.

Then lightly drag lighter brown paint across parts of the wood for texture.

Do not try to make perfect wood grain.

Loose texture works best.

Step 5 — Paint the Mason Jar

Using watered-down blue paint:

Lightly sketch the jar shape.

Then fill it using:

Cerulean Blue

White

Tiny touch of Ultramarine Blue

Leave some areas lighter and unpainted.

Those lighter spots create the illusion of glass reflections.

Easy Glass Tip:

You’re painting light reflections MORE than the actual jar itself.

Step 6 — Add Fireflies Inside the Jar

This is the fun part.

Using:

Cadmium Yellow Medium

White

Dot glowing fireflies inside the jar.

Make some:

bigger

smaller

brighter

softer

Then lightly soften around a few of them using a barely damp brush.

This creates the magical glow effect.

Do not blend all of them.

Some should stay brighter and sharper.

Step 7 — Add Fireflies Outside the Jar

Scatter glowing dots:

in the sky

around the grass

floating around the jar

Vary the sizes and brightness.

This helps create movement and depth.

Less is more here.

Too many fireflies can make the painting feel cluttered.

Step 8 — Add the Moon & Stars

Using Titanium White:

Paint a simple crescent moon

Add tiny white dots for stars

Keep this section minimal.

The glowing fireflies should stay the main focus of the painting.

Step 9 — Add Highlights & Glow

Using white paint:

Add highlights to the jar edges

Add glow on the wood near the jar

Brighten a few fireflies

This final layer makes the painting really come alive.

Step 10 — Final Touches

Now step back and look at your painting.

Add:

darker shadows if needed

brighter glows

a few extra stars

extra grass strokes

But do not overwork it.

Glow paintings look best when they stay soft and dreamy.

Painting Tips

Work dark to light

Let layers dry fully

Use soft blending around glows

Keep grass simple

Do not overblend

Loose strokes create magic

About This Painting

This painting reminds me of warm summer nights outside catching fireflies as a kid — quiet evenings where the world felt peaceful and simple for a little while.

I love how relaxing this painting feels. The glowing lights against the dark sky create such a cozy magical atmosphere without needing complicated techniques or tiny details.

It’s proof that beginner paintings can still feel beautiful, emotional, and special.

Sometimes the simplest paintings end up feeling the most magical.