Brain In A Jar

by Korp

May 25, 2026

In this Posca Club session we’re drawing a floating brain trapped inside a glass jar.

This tutorial is all about practicing chunky Posca outlines, layered brain textures, shiny wet highlights and those weird little tendrils hanging from the bottom of the brain. It looks complicated at first, but the whole thing is built from one repeating wonky U-shape pattern.

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Kawaii Rats

In this tutorial we’re drawing a page full of kawaii rats with one nervous cat stuck in the middle. It’s a fun one for practising simple character shapes, repeated faces, wonky tails and loads of little fur details. This post is for paying subscribers only Upgrade Already have an account? Log in

Sleeping Rat

In this tutorial we’re drawing a sleeping rat inspired by artist Choo Choo Boogie. It’s a simpler Posca character with a curled tail, tiny feet, sleepy eyes and a bit of dribble for extra charm. This post is for paying subscribers only Upgrade Already have an account? Log in

Rat Face

In this tutorial we’re drawing a scruffy rat face with Posca pens. It’s a good one for practising bold outlines, simple colour choices, wonky fur, creepy eyes and adding your own weird little details at the end. This post is for paying subscribers only Upgrade Already have an account? Log in

Brain In A Jar

This post is for paying subscribers only

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