Why does it look chalky?

Gouache contains more pigment and a filler, so it dries matte and slightly powdery. That chalkiness is what separates it from acrylic at a glance.

Why did illustrators use it?

It photographs flat with no glare, reproduces cleanly in print, dries fast and can be corrected. For most of the twentieth century it was the default paint for commercial work.

How do I keep it from looking like vector art?

Ask for faint brush direction inside each flat area and for the edges to be cut by hand. Mechanical perfection is what tips it over.

Gouache Flat

gouache
designer colour
opaque watercolour
poster paint

Opaque matte colour laid in flat even areas, with light painted over dark.

Draw this style

Opens an image model with the prompt in it. The price is on the page before you sign in.

What it is for

Gouache is watercolour made opaque, which removes the one rule that makes watercolour hard: light can go over dark. It became the illustrator's paint because it photographs flat, reproduces cleanly and lets a painter change their mind.

How it works

Opaque matte colour is laid in flat areas. Pale colours cover dark ones completely. Edges are cut by hand so they are clean but never mechanical. Faint brush direction shows inside each area. The dried surface is slightly chalky and completely without gloss.

When to use it

Use it for illustration, editorial and anything that should look designed and painted at once. Avoid it where depth is needed, because flat opaque colour flattens everything.

Told apart from its neighbours

Watercolour Bleed is transparent and cannot go light over dark. Painted Gouache Background is this used behind a cel character. Cartoon Modern is a printed style that imitates the look.

Where it is used

It suits an editorial illustration, a book page, a poster and any picture that should read clearly and feel handmade.

Mid century illustration and poster art
Animation backgrounds and book illustration

The prompt

Replace the blanks with your own character, keep the rest. Then run it on an image model.

<character> painted in gouache, fully opaque matte colour laid in flat even areas with no gloss and no transparency anywhere, pale colours painted confidently over dark ones without the dark showing through, edges left slightly soft and hand cut where two areas meet rather than mechanically sharp, faint brush direction visible inside each flat area, a slightly chalky surface, a muted controlled palette

Run it

What goes wrong

A flat vector illustration comes back. Ask for faint brush direction inside each area and hand cut edges rather than mechanical ones.

Leave out

transparency, gloss, blended gradients, mechanically perfect edges, visible texture, a shiny finish

Watch for

Flat but not mechanical. Ask for faint brush direction inside each area, because perfectly even fills read as vector and the small unevenness is what says paint.

Questions

It is opaque. That single difference means light can be painted over dark, mistakes can be covered, and areas can be laid perfectly flat, which watercolour cannot do.