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pixelimits Digital illustration, working notes

Edition of 20/08/2026 12 entries in 4 parts No advertising, no tracking

Edition of 20/08/2026 · Twelve entries A working reference for digital illustration

Twelve entries on making pictures and on selling them: how a painting is built in Photoshop, how a character is designed so it survives being drawn a hundred times, which program suits which kind of animation, and how a freelance illustrator sets a price, writes a brief and keeps a portfolio worth looking at.

Every entry opens with a one sentence definition, then numbered sections. Where a claim can be checked, it is stated so that it can be: file signatures, colour behaviour, keyboard defaults, dates.

Overhead view of a working illustrator's desk: graphics tablet with stylus, colour swatch strip, printed thumbnail sheet and a monitor showing a half painted planet with its layer panel
The whole reference in one view: a tablet, a value sketch, a layer stack and a page of notes.

Recent revisions

Twelve entries, most recently checked first

  1. Tools and formats

    Software for cartoon animation

    Rechecked the licence tier of two engines after both changed their indie pricing.

  2. Practice and business

    Building an online art portfolio

    Tightened the advice on edit order after reviewing a batch of student portfolios.

  3. Characters and caricature

    Designing funny cartoon characters

    Reworded the silhouette test and added a note on the head count dial.

  4. Craft: painting and space art

    Creating space art in Photoshop

    Added a short note on limb darkening as it applies to gas giants, not just moons.

  5. Tools and formats

    Flash animation and the SWF file

    Added a line on how far Ruffle's coverage of old SWF content actually reaches.

  6. Characters and caricature

    Hiring a digital caricature artist

    Clarified what counts as a usable reference photograph for a live event booking.

  7. Craft: painting and space art

    Digital painting in Photoshop

    Reordered the section on flow against opacity to match the actual brush setup order.

  8. Practice and business

    Designing a logo as a freelancer

    Added the embroidery needle test to the list of checks a mark has to pass.

  9. Craft: painting and space art

    Space art techniques: surface and light

    Rewrote the falloff section so it reads as a lighting problem, not a colour recipe.

  10. Characters and caricature

    What shapes a caricature quote

    Added a worked example that walks through the six variables on a real quotation.

  11. Practice and business

    Pricing illustration work

    Updated the day rate worked example against current freelance overheads.

  12. Practice and business

    Becoming a freelance illustrator

    Revised the three stage outline after several readers asked about the middle stage.

1Practice and business

1Practice and business : Digital illustration reference: painting, character design and freelance practice

Four entries

Becoming a freelance illustrator the trade, stage by stage Ref PR 01

Freelance illustration is commissioned image making: a client buys a picture made to a brief and, with it, a defined right to use that picture. What separates the trade from the hobby is the paperwork around the drawing, not the drawing. the three stages, and what each one costs you

Pricing illustration work day rate and licence fee Ref PR 02

Two models cover almost every commission: time sold by the day, and use sold by the licence. Mixing them up is the single most expensive mistake in the trade, because a licence fee answers to the size of the use, not to the hours spent. how a day rate is built from your own costs

Building an online art portfolio what to show, in what order Ref PR 03

A portfolio is not an archive. It is a short argument that you can make a particular kind of picture on request, which means every piece that does not support the argument weakens it. the edit, the order and the technical checks

Designing a logo as a freelancer a mark, not a picture Ref PR 04

A logo has to survive one colour, a stamp, an embroidery needle and a sixteen pixel favicon. Illustrators are often hired for marks precisely because of their drawing, then lose the job on reproduction. the tests a mark has to pass before delivery

2Craft: painting and space art

Three entries

Digital painting in Photoshop a beginner's order of work Ref CR 01 · method

Digital painting is building an image from brush marks on raster layers, in an order that keeps every decision reversible for as long as possible. Beginners rarely struggle with the brush; they struggle with the order. flow against opacity, masks against the eraser

Creating space art in Photoshop the build order for a scene Ref CR 02 · method

Space art is astronomical subject matter painted so that it reads as physically possible: star fields, gas, a lit body, a shadow with a hard edge. The order of the build matters more than any single brush. star colour, nebula colour, and the terminator

Space art techniques: surface and light emissive materials, falloff, passes Ref CR 03

Once the scene is blocked in, the work becomes a lighting problem: how a self lit material behaves, how quickly its light dies with distance, and how to keep the passes separate so the grade stays under control. why a lava field tints its own shadows

3Characters and caricature

3Characters and caricature : Digital illustration reference: painting, character design and freelance practice

Three entries

Designing funny cartoon characters shape, silhouette, flaw Ref CH 01

A comic character is a drawing solved for reading at a glance, for being redrawn without drifting, and for carrying a joke in its stance. The design carries the flaw; the writing only names it. the silhouette test and the head count dial

Hiring a digital caricature artist brief, reference, rights Ref CH 02 · brief

Caricature exaggerates what is already distinctive in a face, so the whole job depends on the reference photographs and on a brief that says what the picture is for. Live event work and studio commissions are two different trades. what to send, and what to put in writing

What shapes a caricature quote the variables behind a figure Ref CH 03

Number of faces, level of finish, background, revision rounds, deadline and intended use: those six variables explain most of the spread between two quotations for what looks like the same drawing. reading a quotation line by line

4Tools and formats

Two entries

Software for cartoon animation twelve programs compared Ref TL 01

There is no best animation program, only a best fit between what you are making, what it has to export to, and whether you draw every frame or rig a puppet and move it. the comparison table, by approach

Flash animation and the SWF file 1996 to 2021, and after Ref TL 02

For fifteen years one plugin carried most animation on the web. The format it published, the SWF, is still readable, and knowing how it is put together is what makes an old file recoverable. the dates, the file signatures, the emulators

5What an illustrator delivers

Formats at a glance

Most delivery arguments come down to three questions: does the format keep transparency, does it throw pixels away, and can the client open it. This is the short answer for the formats an illustration job actually uses.

Formats an illustration job actually uses
Format Kind Transparency Compression Use it for It fails at
PSD Layered raster Yes, alpha Lossless The working master, kept by the artist Files above 2 GB or 30,000 px a side: use PSB
TIFF Raster, layers optional Yes, alpha Lossless (LZW or ZIP) Print delivery when a flat, safe file is wanted Web use: the files are heavy
PNG Raster Yes, 8 bit alpha Lossless Line art, flat colour, screen delivery with a cut out Photographic paintings: the file balloons
JPEG Raster None Lossy Photographic previews and web proofs Line art and flat colour: edges break up
WebP Raster Yes Lossy or lossless Web delivery when weight matters Older print and studio tools that cannot read it
SVG Vector Yes Text file, gzip friendly Logos, icons, marks that must scale Painterly work: it is not a paint format
PDF (PDF/X) Vector and raster container Depends on build Mixed Handing artwork to a printer Being treated as an editable source file
SWF Legacy vector animation Yes Zlib or LZMA Reading archived Flash work Anything new: browsers stopped running it in 2021

Wide table: scroll it sideways.

6Glossary

34 terms