Most people who order a custom paint-by-numbers kit have no idea what happens between uploading their photo and opening the box two weeks later. The process is more interesting — and more human — than most assume.
This article walks through how a custom paint-by-numbers kit is actually made, step by step. If you are curious about ordering one, or thinking about making one yourself, this is the honest version.
Step 1: The Photo
Everything starts with the photo. The single biggest predictor of whether a custom kit will turn out well is the quality of the source image. We go through this in detail in our guide to which photos work best for a paint-by-numbers kit.
Good photos are sharp, well lit, taken at eye level, and show the subject clearly against a relatively simple background. Bad photos are blurry, dark, taken from above, or have the subject lost in a busy scene.
A serious custom company will tell you when your photo isn't going to work, and ask for a better one. A cheap one will print whatever you send and let you discover the problem after delivery.
Step 2: Background Removal and Composition
The designer removes the original background and replaces it with something simpler — a soft gradient, a neutral colour, or a clean scene that doesn't compete with the subject.
Composition is adjusted too: the subject is centred, cropped to the canvas ratio, and resized for the chosen kit dimensions.
Step 3: Stylisation and Edge Cleanup
The cleaned image is then stylised for paint-by-numbers. Soft photographic gradients have to become discrete regions of flat colour. This is the step where automated tools fail and human designers earn their keep.
Eyes are sharpened. Fur or hair is broken into deliberate strokes rather than noise. Edges are clarified. Areas that would otherwise convert into hundreds of tiny unpaintable regions are simplified.
Step 4: Palette Reduction
A custom kit usually uses 24 to 36 paint colours. The original image often contains thousands. A good designer chooses a palette that captures the subject faithfully while staying within the colour budget — and adjusts the palette to suit the canvas size.
Step 5: Numbered Region Mapping
Each area of the design is assigned a number that corresponds to one of the paint pots. The mapping has to balance two competing goals: regions should be large enough to paint comfortably, but small enough to preserve detail in important areas like faces.
Premium companies vary region size across the canvas — bigger in skies and backgrounds, smaller in eyes and noses.
Step 6: Printing the Canvas
The finished outline is printed onto pre-stretched linen canvas at high resolution. Numbers are printed in a soft grey that disappears under paint. The canvas is allowed to cure briefly so the ink doesn't transfer to brushes.
Step 7: Mixing the Paint
Each paint pot is mixed to match its designated palette colour. Premium kits use heavy-body acrylics that go on opaque in a single coat. Cheaper kits use thin paints that need two or three layers — which is why some kits feel endless and others don't.
Step 8: Assembling the Kit
The canvas, paint pots, brushes, colour card and reference sheet are packed together. A good kit also includes the original (unstylised) reference image so the painter can compare while they work.
Step 9: Quality Check and Shipping
Before shipping, a final quality check confirms paint pots are sealed, the canvas is undamaged, numbers are legible, and the contents match the order. The kit is then shipped — ideally with tracking and protective packaging.
Can You Make a Custom Paint-by-Numbers Kit Yourself?
Technically yes. Practically, almost no one should. The software, the printing, the paint mixing and the canvas preparation each require specialised tools and supplies, and the cost of doing it once is dramatically higher than ordering a custom kit from your own photo.
Where DIY makes sense is for the design itself: there are free tools online that will convert a photo into a paint-by-numbers preview, which is a good way to see whether your photo will work before paying anyone.
Making a custom paint-by-numbers kit is mostly invisible work. A good kit looks effortless to open and to paint — and that ease is the result of dozens of small decisions made by a designer most customers never meet. When the process is done well, it shows in the finished painting on the wall. The short version of our own process is on the how it works page.
— Be Artistic Club