An illustration is decided at about the size of a postage stamp. Sanna is drawing 24 spreads for a picture book about a lighthouse keeper on Oland, and every one of them starts as a rectangle 40 px wide with four or five marks in it. At that size there is no drawing to admire and no rendering to hide behind, so the only things visible are where the dark mass sits, where the eye lands and whether the page reads at all. 20 thumbnails, 6 roughs, 3 developed, 1 finished is the shape of one spread, and the decisions that matter are all made in the first number.
Keep the thumbnails 40 px wide, checked at that size rather than zoomed. The temptation is to draw them small and then look at them large, which is the same as not drawing them small.
One skill, several surfaces, several jobs
What this topic is made of is easy to misread from the outside, because the clusters below look like seven different crafts. They are one skill on top, and the skill is drawing: the fundamentals everything else is built on is not a beginner ring you leave behind, it is the thing being done in all of the others. Under it sit surfaces, which are how the marks get made. Painting with a tablet, and what it borrows from oils and images that scale to any size are two surfaces with almost nothing in common technically and the same drawing underneath both.
Then jobs, which are what the image is for. A figure that reads as a person before it moves has to survive being turned and repeated; designing what does not exist yet is judged on how many usable options arrive by Thursday rather than on any one of them; letters drawn as images rather than set as type is drawing that happens to be a word. A surface is learned in weeks and a job is learned in years, and the skill under both is learned in decades, which is the honest ratio and nobody puts it on a course page.
Four moves, in an order that will not bend
Thirty seconds a pose, twenty poses, no erasing. That is the warm-up that trains the first move, which is gesture: one line for the whole action before any part of it is described. A figure built part by part from the head down arrives with a stiff spine and a shoulder that has to be argued with for an hour, and the drawing never recovers because everything after it was measured against a mistake.
The second move is construction, and it has a value attached. Measure in head heights with the pencil at arm's length: elbow locked so the pencil is always the same distance from your eye, thumb marking the top of the head, then step the same length down the figure. An adult stands about seven and a half heads, a child of four about five, and the lighthouse keeper is drawn at six and a half so he reads as broad and short next to the door of his own tower. The measurement is not a rule about how people look. It is a way of catching your own drawing being wrong before you have spent four hours on it.
Third, three values before any colour. Reduce the whole image to light, mid and dark, nothing between, and look at it at 40 px. If the keeper's head is a mid tone on a mid background he disappears at that size and will still disappear on the printed page, whatever colour goes on afterwards. Fourth, and one line in a corner: write the light direction in the corner before painting. Sanna's spreads have one source, the lamp, so every shadow on every object points away from it. Beginners light each object separately, which produces a page where nothing sits in the same room.
Two tests that take ten seconds each
Fill it black and see whether it is still recognisable. A character that survives being a black shape survives being small, being far away, and being printed badly. The keeper works as a silhouette because of the hat and the lamp he carries at knee height; strip the colour off the harbourmaster drawn beside him and the two are the same shape, which is a problem no amount of face detail repairs.
The vector one is different in kind. Put anchor points at the extremes and nowhere else: the top, bottom, left and right of a curve, with the handles horizontal or vertical at each. A gull drawn with 4 anchor points has a wing that can be adjusted; the same gull traced with 19 has a wing that ripples and cannot be edited by anybody, including the person who drew it. The count is the tell, and it is visible in the file before it is visible in the image.
One spread
Nineteen of the twenty were always going to be thrown away
The width of each band is its own count, so the drop is the data: almost all of the loss happens at the first stage, on purpose, and cheaply.
- Thumbnails, 40 px wideFour or five marks each, twenty minutes for the set20
- Roughed upStill no rendering, and the value pattern now readable6
- DevelopedDrawn properly, shown to somebody who is not you3
- FinishedThe only one that gets the ten hours1
The counts are one illustrator's habit on one book rather than a rule. What is not negotiable is the direction: a process that starts with three ideas is choosing between three, and choosing between three is not choosing.
The stall is rendering a drawing that is not right yet
This is where people in illustration stop making progress without noticing they have stopped. Rendering feels like work: it is calm, it is visibly detailed, and every hour of it produces something that looks more finished than the hour before. Drawing feels like failing, because the whole point of it is finding out what is wrong. So the six hours go on skin and texture over a shoulder that is in the wrong place, and the piece gets worse the longer it takes, and afterwards nobody can say when it went wrong because it went wrong before any of the hours were spent.
The 40 px check is the cure and it costs nothing. If the value thumbnail does not read, no rendering saves it, and the correct move is to throw the piece away at the twenty minute mark instead of at the ten hour mark. The other half of the same discipline is to decide the final size before the first mark. Sanna's spreads print 240 mm across, so detail finer than about a millimetre is being drawn for nobody, and the keeper's face on the wide spreads is roughly the width of a fingernail, which decides how much face there is going to be.
What to open in 2026
Procreate is the ordinary answer for drawing and painting, bought once rather than subscribed, and it replaced the sketchbook plus scanner for a large number of working illustrators after about 2018. Procreate is iPad only, which is the constraint to know before buying anything. Krita is the free and open source painting program and it is genuinely a working tool rather than a consolation: it replaced Photoshop as the free path for painting, and it has the brush engine to justify that. Inkscape does the same job for vectors, free, against a program that costs a subscription.
Generative models are now part of this topic whether or not anybody wanted them to be, and the honest description is narrow: they produce many options quickly, which is exactly what the first afternoon of concept art needs, and they do not hold a character across 24 spreads, which is what a picture book is. Sanna can get forty lighthouses in an hour and not one lighthouse keeper who is the same person twice.
What none of this answers is who the picture is for and what it has to sit next to, because an illustration almost never appears alone. It goes on a cover, in a layout, beside type set by somebody else, and the decisions there belong to marks, layouts and printed things. The rules for how it reads once it is placed, the distances and the differences, are the principles that hold whatever you are designing. And the question after both is which program the work actually has to live in, which is the software, and the parts of it actually used, and it is a shorter list than the menus suggest.