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DIGITAL PAINTING

The major aspects of digital painting explained and illustrated for artists and collectors



A COMPLETE SURVEY

Covers the major aspects of digital painting, written for artists, art students, art historians, galleries, curators, collectors and art lovers. For a brief overview, follow the link to: DIGITAL PAINTING, a brief overview

Updated since 2013. Last update April 13, 2019

The information you find here draws on the experience of a handful of pioneering digital painters. It is independent, revenue-free, regularly updated, and offered without cookies. The text has been dedicated into the Public Domain by a CC0 1.0 universal license. You are free to copy, print and use it in any way you like. The images are protected by copyright unless otherwise stated.

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Definition
Visual characteristics
Differences in method
Double carrier
Prints only
Protecting originals and limited editions
Mainstream directions: computer generated, raster, manual vector, mixed media
New photography
Size, resolution, enlargement
Vector and raster painting enlargement
About color
Texture
Quality-quantity convention, limited editions
Painterly development
Collecting digital art, assessment
Market for digital art
Certification
Links

Gallery of characteristics
Gallery of computer-generated paintings
Gallery of raster paintings
Gallery of vector paintings
Gallery of vector-raster paintings
Gallery of photo-based paintings
Gallery of preset styles and conversions

Definition

Definition

A 'digital' painting is created on the computer using a graphics program, a virtual paintbox with brushes, colors and other supplies. The definition applies to a painting on its primary digital carrier (as a computer file) as well as when it is transferred in a non-manual process to a secondary physical carrier (printed on paper, acrylic glass, aluminum, canvas, etc).

Visual characteristics

Visual characteristics

Apart from the traditional tools, the virtual painting box contains instruments that don't exist outside the computer. The use of these instruments distinguish a digital from a non-digital painting. Typical characteristics can be traced back to the power of the computer to attach geometrical formulas to lines, shapes and forms. While it is impossible for a human hand to create exactly identical forms, or construct a perfect circle or a perfectly straight line, for a computer it is difficult to do anything but this. Formula-based shapes are easy to recognize by a degree of perfection that is literally inhuman. They bear some resemblance to paper cut-outs or stencil art. Specific traits include:

- Sharp, bold appearance
- Transparency
- Symmetry
- Exact repetition
- Perfect circles, squares and other shapes
- Embossing, shading and other 3D illusion
- Perfectly smooth gradients
- 100% monochrome color planes
- Absence of brushstroke
- Slalom or flip forms
- Effects of automatic transformations (mirror, ripple, swirl, shear, multiply etc.)

The flatness of the physical representation is typical for the digital medium. It is possible to create a convincing illusion of texture on the virtual canvas, but not to translate this to real texture on paper, dibond, perspex etc.


Pauline van de Ven, Digital vector painting
Manual vector painting with a raster shape
Van de Ven: Ceci est un oeuf (2015)


Definition

Differences in method

Spontaneity
In most programs it is possible to undo all or a large number of brush strokes and other actions without a trace. No longer can a painting be spoiled with one stroke. The 'undo' and the many push-button transformations give digital painters the freedom to work faster, freely make mistakes and take a more experimental and spontaneous approach to their work. The creation of computer generated images in particular can be unprecedently quick and spontaneous. As to the brushstroke, it should be noted that manual vector painting involves the manipulation of shapes with a specific tool, which is a slower and more deliberate process than stroke-by-stroke painting. However, the undo and push-button transformations are available for manual vector as well.

Influence of the artist
While 'art' is usually defined as 'human' creative skill and imagination, it becomes increasingly difficult to assess to what extent a painting is the result of human effort. The difference in method is probably best expressed by the influence that the artist exerts on the final result. In traditional painting this influence is perforce 100 percent. This is still true for raster painting and manual vector. For computer generated painting it varies from 0 to 100 percent, depending on the software, the chosen framework and the preferences of the artist. The method can be a process of construction when the artist originates the image and uses input parameters or a set of rules to determine the final result. It is a process of play when the artist uses a push-button transformation and plays with the input parameters until the generated image is to his or her taste. And it is a process of selection when the artist makes a series of automated push-button transformations and selects a generated image without changing it.

Digital and physical carrier

Double carrier

When the digital artist is done, the painting is on the hard disk of a computer. In order to sell it, it will have to be transferred to a physical carrier like dibond, fine art paper, acrylic glass, etc. What happens to the primary digital carrier depends on how the artist wants to offer the painting. If the print is sold as an original, the digital carrier is either deleted or transferred to the buyer. If it is offered as a series, the artist deletes the digital carrier when the prefixed number of copies is sold. For an open ended series, the digital carrier remains on the hard disk of the computer. The buyer should be informed about the status of the digital carrier.

Prints only

Prints only

Obviously, forms and shapes that are typical for digital painting cannot be transmitted to a physical carrier in a manual process. The digital characteristics would be lost. The implication is often under-emphasized: a digital artwork, in its physical representation, is and can only be a print. If an artwork that was created on a computer is printed on canvas and, as is often the case, painted over with real paint, the result is a traditional painting but the original work on the computer still meets the definition of a digital painting.

Protecting originals and limited editions

PROTECTING ORIGINALS AND LIMITED EDITIONS

It is a common misunderstanding that a print cannot be a numerously unique work of art. It can and often is. There are a number of ways to protect uniqueness and limited editions.

Precautions
The artist should protect full-size, high resolution files of the artwork by choosing safe methods of transfer and sharing full scale files only with printing companies that delete them after use. Depending on the difference in scale between the original and the online image, raster and combined vector-raster paintings can be effectively protected by using low resolution and small size files for online display. Stronger measures such as DAM are needed to protect duplication and enlargement of online vector paintings.

Protection of the print (PAM)
PAM (physical asset management) consists of a manual signature and/or a unique mark both on the printed artwork and the certificate. The mark establishes authorship and protects prints from duplication. With a GS1 or EAN code an artwork (any product) is identified worldwide with a unique number. The number is translated into a small image like a barcode or a datamatrix which can be attached to the certificate and the printed artwork. GS1 codes are issued in over 100 participating countries.

Protection of the digital image (DAM)
DAM (digital asset management) is used to establish authorship of the digital image and to prevent it from being copied and used to produce prints and certificates without marks or with forged marks. A unique digimark is registered and embedded in the code of the image. Other than a digital watermark, that is placed over the image and can easily be removed, an invisibly embedded digimark survives a variety of manipulations and transformations, even duplication by screenshot. Digimarks are optionally supplemented with a search service that crawls the Internet tracing and reporting copies.

Leo Geurts and Lambert Meertens: Kristalstructuren
Computer generated art (source mode):
Leo Geurts and Lambert Meertens Cristalstructuren (1970)

Mainstream directions: computer generated, raster, manual vector, mixed media

Mainstream directions

Based on differences in method and appearance, four mainstream directions can be recognized:
1. Computer generated painting 
2. Raster painting
3. Manual vector painting
4. Mixed media and hybrid painting 5. Digital photo art

Karin Kuhlmann: In between
Computer generated art (design mode):
Karin Kuhlmann: In Between 11 (2008)

Lev Stepanos: untitled
Raster painting: Lev Stepanos, Untitled (undated, ca. 2012)

Amparo Higon
Manual vector painting
Amparo Higón: Self portrait (2016)

Pauline van de Ven, Digital vector painting
Floating appearance of a large vector-raster painting on Xpozer


Hybrid vector-raster painting
Hélène Goldberg: Sunny angle



Dolores Kaufman: Inner sanctum
Digital photo art
Dolores Kaufman, Inner sanctum (undated)

New photography


New photography

The relation between painting and photography is centuries old, but never before has it been so close. To place a picture on a digital canvas and transform it into a painting now requires nothing but a push on a button, and a photographer today uses the same software for editing and transforming a photo as the artist for creating a painting. The shared toolbox entails changes in painterly development (see below) and creates a new transition zone between painting and photography.

Filters 
A variety of media filters can make photos or screenshots resemble an oil painting, watercolor, wood-cut, etching, etc. Style filters can put them in the visual framework of Seurat, Van Gogh, Pollock and many others, and form filters create effects like circle, wave, multiply, mirror, swirl and shear, or break up the image in a kaleidoscope of geometric forms that radiate from a central point in perfect symmetry.

Mixed media
While these transformations are push-button, they are often part of a more complex method that combines several kinds of photographic, computer-generated and painterly aspects in subsequent stages. A possible workflow might be: a screenshot or photo is taken, subjected to a transformation like a swirl and put on the canvas as component of a painting. Applied as mixed media, new photography makes an important contribution to contemporary visual language.

The storage format of photo-based art is raster.


auto image transformation
Blue coffee-cup (three form transformations of the same picture)


File formats

Picasso
Picasso: Woman with a blue hat
(Enlarge to see the effect of a 300 pct. resize of a raster image)

Size, resolution, enlargement


Size, resolution, enlargement

When the artist increases the height and width of an existing image, its resolution or information density decreases and it will become vague. Resolution is usually expressed in dpi (dots per inch). While the image on the screen already looks sharp at the standard resolution of 72 dpi on the web, a physical carrier needs 300 dpi or more to look sharp. Moreover, the physical carrier is usually much larger in height and width as well.



Bonnard
Two enlarged fragments of Pierre Bonnard's Getting out
of the bath
(1930) (zoom in)
 

Correction of raster painting enlargement

Vector and raster painting enlargement

For a vector painting, where colors and lines are controlled by formulas, enlargement requires nothing but a push on a button. There is no loss of resolution. For raster painting, information will have to be added to fill in the gaps. This is done with the help of enlargement software or by the 're-size' option in the painting program. Automatic enlargement usually needs manual corrections.

Although much progress has been made in automatic enlargement, it remains difficult to fill in the empty space between handmade lines and shapes. Lines become unsteady and crumbly and unintended 'noise' appears along the edges of color patches. The image above shows two different types of online enlargement of the same fragment of Pierre Bonnard's Getting out of the bath. Note that each entails its own noise and deformation.

In order to eliminate deformation and obtain a faithful representation of the original, automatic enlargement is usually followed by manual correction. Depending on the speed of the computer and the chosen size and resolution of the image, correction can be slow or even come to a halt. The screen, of course, is not enlarged: the artist can no longer see the whole image and has to zoom in and out, switching between corrections and reviewing the results. Depending on the size of the file, the slow and detailed process compares to fine needlework.

Recently, several programs for raster and hybrid painting introduced ‘scripting’. Strokes and actions that compose the image are recorded and can be repeated in an automated process and without loss of resolution on a larger canvas on the desktop.


Pauline van de Ven:Anna
Printing colors: faithful color representation with the CMYK color profile
embedded (l). Green cast with an RGB profile for online display (r)

About color

About color

For artists and collectors alike, a faithful representation of colors is of prime importance.   

To see colors
Every computer screen deviates to some degree from the 'true' colors that are set as a standard by the international color convention (ICC). These deviations can be corrected by a calibration of the screen. For anyone working with colors it is necessary to calibrate the screen regularly. It is done with a small sensor that calls up a number of colors on the screen, compares them with the standard values and creates a monitor profile which is automatically installed as the default. It runs silently in the background and has only one task: to keep the individual screen fixed to the standard. Although, confusingly, this profile is listed between a whole range of optional profiles for printing, it should be left alone. It is not embedded in an artwork.

To create colors
In desktop painting software, the basic profile types have their corresponding palettes and matching color spectrum in the workspace. It is advisable to work in the palette and the spectrum that matches the destination - CMYK for printing, RGB for online display and grayscale for black and white. Changing RGB to CMYK profiles is not (yet) possible on mobile devices.

To display and print colors
The artist should embed a color profile in the finished artwork that matches one of two destinations: a webpage or a printing company. This is important because the color palette for printing is much smaller than the palette of a computer screen. If the artist sends a painting to the printer that has the RGB profile for online display embedded, every color that is not available will in an automated process be translated to neighboring color that can be printed. The result can be disappointing.
This is especially relevant for painters working on mobile apps because they have the RGB profile embedded in their artworks. A desktop painting program should be used to convert RGB colors to a CMYK profile for printing. Most printing companies supply their own profile, tailored to the machinery, ink and choice of paper. They can also prescribe one of the CMYK profiles that are available in most computers. Some accept files with the RGB profile and convert them to their own CMYK profile.

Colors in browsers
Only 216 colors are standardized between browsers. The artist who wishes to avoid online color deviation has the option to use the 'web safe color palette'. However this seriously limits the choice of colors.

In conclusion, three things are needed to see and to represent colors reliably:
(1) The screen should be calibrated.
(2) The artist should paint with the color palette that matches the destination. If this is not possible, paint in RGB and convert to CMYK before sending the work to the printer.
(3) The right profile should be embedded in the artwork, RGB for digital destination and CMYK for a printing company.

Colors of prints at online galleries
Galleries use RGB files for online presentation to offer physical prints. The RGB color palette is used as it is or auto-converted to the CMYK palette. Small or large color deviations are inevitable, especially if bright or 'psychedelic' colors have been used. If accurate color representation is important, the artist can order a proof from the gallery before offering prints. Approval of a proof can be mentioned in the description of the painting.


Digital texture
Illusion of texture (fragment, raster painting)
 
Caroline Weber Fischer: August im Lauerzersee 


Texture

Over the centuries art lovers have felt the hand and mood of the painter in brush strokes and paint. Many find that a painting without texture is fine in a book, but doesn't feel right on the wall. Though a stylus can be as sensitive to the pressure of the hand as a traditional brush, and the pressure can be made visible on the screen, a digital painting is entirely flat. Some artists accept flatness as a property of digital painting. Many print or project their work on a physical carrier and paint it over, thereby using the computer as a preparatory device and sacrificing the digital characteristics. Brushstroke gel is widely used to simulate brush strokes on a printed canvas. 


Quality-quantity convention, limited editions

In traditional painting, the numbering of a limited edition by convention follows a quality/quantity notation 'i/n' in front of the artwork. Where 'i' indicates a rough ranking of the individual print according to technical and aesthetic quality and 'n' is the size of the edition. Since all prints of a digital artwork are identical, 'i' has no other meaning than to let a buyer know how many prints are still available. The meaning of 'n' is still the same: the size of a limited edition has economic significance for collectors. As in traditional painting, the size of 'n' is set by the artist prior to the first sale. The artist keeps register of the number of copies that are sold. Open series are referred to as '∞' and numerically unique prints as '1/1'. In the automated printing process, the unnumbered run-up prints that are traditionally labeled as 'E.A.' (epreuve artiste) or 'A.P.' (artist's proof), can still occur.


Painterly development

A great variety of digital tools brings the artist new means to express thoughts and feelings. On the negative side, the more the computer facilitates their work by offering easy imports, taking over painting processes and offering a wide array of styles and transformations, the more difficult it becomes for painters to develop their own idiom, to take distance from images that are already created and to make the voice of the computer secondary to their own.

The choice for an app narrows to some extent the development of the artist by limiting him or her  to the possibilities and the style of the software. Further development is a process of interaction. A considered choice of a painting app should also take into account the risk that a software developer will not be able to keep up backward integration. In such a case paintings created with older versions of an app may no longer be available for transfer or printing.


Collecting digital art, assessment

Calibration
In order to eliminate the color bias of the individual screen, it is important to regularly calibrate (see 'about colors').

Sample
Even with proper calibration, it is difficult to assess the look and feel of a painting online. Colors to some extent vary with the physical carrier of the artwork and with the type of screen of the spectator. Moreover, many online colors in the online presentation simply can not be printed at all, even with the right color profile embedded. The best way to judge a digital painting is by a sample. It should have at least the size of a postcard, be printed on the chosen physical carrier (paper, acrylic glass, aluminum etc.) and executed with the same resolution and by same printing company that prints the final artwork.

Browsing online galleries
Collecting digital art starts with browsing and research. To browse the many online portfolios is not yet as easy and pleasant as it can be. There is a great deal of room for improvement in search algorithms. At the time of writing the search process has several serious limitations.  

- Limitations by choice
Galleries with 'follow me' and 'thumbs-up' features rank artists by their number of followers, number of likes, and number of paintings in their portfolio. The artistic value thus measured results in increased visibility for some and decreased visibility or invisibility for others in search results. Though stars and thumbs are a common way to valuate all kinds of products, application to art and literature is an issue. Some critics have posited that thumbs-up could be a contra-indication for artistic value.


measuring artistic value


- Limitations by lack of information
Despite the invitation at some galleries to filter for mainstream digital media like ‘vector’, ‘raster’, 'fractal', 'new photography' etc., as yet few are able to live up to promise. It should be realized that a collector usually does not know the name of the artist. Therefore, if the medium search key doesn't function properly, artists remain invisible. The quality of a search machine is easily assessed from the results. If it is good, a more or less homogenous catch of paintings in a particular medium is brought up. If it presents an incoherent mix of all kinds of digital and non-digital media, there is a visibility issue. Search results can be supplemented at other galleries and Google images. 

Information about the software that is used to create the painting is seldom available. In order to appreciate originality and technical skill, to distinguish what comes out of the app from what comes out of the artist and perhaps to judge if art claims are justified, some collectors would probably like to know which program was used to create the painting. (Visit Ben Guerette's A Blog appArt for a wild variety of styles and technical skills that are a property of the software.)

Information about resolution or the number in a limited edition are also often not yet included in artwork descriptions. 

- Limitations by mistake
Search results are often dominated by large numbers of images by only a few painters. If collectors tire from so much homogeneity and decide to resume at another time they will have to go through the same images again. Some galleries lower the resolution of paintings to speed up browsing, which results in blurred images. While frustrating to artists, it deprives collectors of the more time-efficient method of judging sharp small-size images at first sight.

Buying
It remains important to buy from a trusted party. While most digital painters are still alive, their work can be bought directly at their website or at online galleries where they show their portfolios.

Buying directly from the artist has pros and cons. The color quality of the print is a pro, if the artist will embed a proper CMYK color profile for printing, make corrections when needed and has the work printed at a professional printing company. Galleries use the RGB files for online display for prints, with inevitable small or large color deviations. On the other hand it is not easy for individual artists to match the attractive display and safe buying framework with payment, delivery and professional sales conditions that the galleries have to offer.

If features like an approved color proof, a sample, a manual signature, protection against duplication and a certificate are not mentioned in the description of the artwork, the collector can suggest to make these provisions. For prints that are produced by the gallery, a signature and a barcode or other protective measure an usually be arranged by having it sent through the artist.


Market for digital art

The market for digital art is gradually maturing. Collectors start to realize that digital painting is a new visual language that can't be expressed with traditional means. Many problems have been solved. Color representation has become fairly reliable thanks to calibration and the use of color profiles. Digital and physical asset management and a responsible handling of digital files have brought the risk of duplication down to an acceptable level. Slowly but steadily, digital paintings are finding their way to museums, auctions and galleries where they meet a new generation of collectors.

Yet many highly professional, even pioneering digital painters lack the technical know-how to get their work out of the computer and into the real world. Most rely on an online gallery. The larger galleries offer an abundance of originals and limited edition quality prints worldwide with good sales conditions. This relieves artists of technical concerns. On the negative side, if printing is left to the gallery and the print sent directly to the collector, the artist can no longer evaluate and if necessary adjust the (color) representation. Physical asset management such as a manual signature is somewhat more complicated, and the computer of the artist is no longer the only location where a high resolution file of the painting is stored.


Certification

A certificate is a document that bears a mark of identity such as the signature of the artist, often supplemented with a personalized sign, watermark, bar code, fingerprint or hologram which matches an identity mark on or in the artwork. It contains a copyright declaration, distinguishes between an original and an open or closed edition, states the size of a limited edition, binds the artist to deletion of the digital carrier after the sale, and conditions the display of the artwork after it is sold.  A Certificate of Unicity for a numerically unique print ('original' or '1/1') a Certificate for a Limited Edition and a Certificate for an Open Edition is regularly updated and freely available on this site.



LINKS

Brushstroke gel:  Water-soluble acrylic polymer containing a UV inhibitor which helps protect a painting from yellowing and fading. Also used to recreate brushstrokes on digital paintings printed on canvas. http://www.artandframingsolutions.com/BrushstrokeGel.htm

Blogs:
Don Archers blog, Digital art, artists and commentaries

Color calibration:
General information
Spyder calibration sensor

Carriers for digital painting:
Xpozer, Prints on polyester coated paper, floating, unframed mount (sRGB profile accepted)
Whitewall, Prints on Hahnemuele paper, canvas, aluminum, dibond, perspex, (printer's color profile supplied)
Drukwerkdeal, Postcards, large format prints on dibond and brushed aluminum, postcards (printer's color profile supplied)

Certificates:
Certificates For original, limited and open edition

Conversion:
Automatic conversion, photos to paintings, drawings and cartoons
Waterlogue, Automatic conversion of photos to paintings, drawings and cartoons

Enlargement, digital:
Many programs listed
Oneone perfect resize, (enlargement correction)
ZoomPro5, Ben Vista

Enlargement, manual (projection of physical and digital image on walls, canvas etc.):
artograph
beamers (choose a led beamer to work in daylight)


Fractal art:
Fractal art, video1
Fractal art, video2
Fractalart

Galleries, online:
Absolute Arts
Flickr
Gaac
MOCA
Saatchi online

Galleries, physical:
Agora
West 25th Street, New York, NY)
K16
Keizersgracht 16, 1015 CP Amsterdam, NL)

Hand painted copies:
Dafen Village, China:  
By artist, style, size

Mark, barcode, digimark, hologram (print and digital image protection):
Barcode registration GS1
Digimark (invisibly embedded watermark with tracing option, a Photoshop plug-in)
Security hologram

Museums:
MOCA  Museum of Computer Art (MOCA) of New York State University offers emerging directions in digital art an online platform since 1993. Annual juried competition in digital art, catalogue.

Photo art and artist portfolio:
Flickr

Programs for painting on iPad and iPhone:
Brushes (raster)
Adobe Eazel (raster) (no undo option)
Adobe ideas (vector) (in combination with Adobe Illustrator)
Paintbook Penultimate
ArtRage (hybrid, with scripting)
Procreate (maximum canvas depends on device. iPad Pro 16,384 x 4,096)
Inkpad (vector, open source)

Programs for painting on PC and Mac:
Overview
Adobe Photoshop CS6
Corel drawing

Programs for computer generated painting


Programs for computer generated painting:
Fractal Arts
FractalScapes (iPad)
Fractoscope (L-systems, iPad)
ImageSynth (Stochastic rules iPad)

Programs for vector painting:
Overwiew of vector programs and file formats
Adobe Illustrator
Adobe ideas (iPad) (in combination with Adobe Illustrator)
Inkpad (iPad/iPhone) (open source)
Inkscape(open source, desktop)
Photoshop.com
CorelDraw for Windows

Registration:
For artwork on paper

Style:
A Blog appArt, An overview of styles and features of apps and painting software by Ben Guerette

Vector art: 
vector art, video
Pno expo
Blood sweat vector

Vectorization, online (raster to vector conversion):
Vectormagic
Autotracer



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WHAT'S NEW?

2019/04/13
Update of 'New Photography', update of 'Collecting, browsing online galleries'. Update of 'DP, brief overview'.

2019/04/10 Update of 'Digital painting and photography'. Update of 'Collecting digital art, assessment'. Update of 'Differences in method.' Update of 'Digital painting and photography'. Added images.

2019/04/04 Update of 'Computer generated painting'. Update of 'Differences in method'. Update of 'Collecting digital art, assessment'.

2019/02/12 Update of 'Visual characteristics'. Added tip jar.

2018/12/18 Update of 'Protecting originals and limited editions'

2018/11/28 Text corrected and modified

2018/03/13 The text dedicated into the Public Domain

2017/09/13 New certificates (version 5.0)

2017/08/30 Update of 'Characteristics'; 'Uniqueness and limited editions'; 'Links'

2017/08/22 Update of 'detailed survey'

2017/08/14 Update of 'brief overview'

2015/08/08 New certificates: (v.4 for originals, v.1 for editions)

2015/08/06 Update 'Market for digital art'

2015/08/03 'About color'

2015/05/21 'File formats'

2015/05/01 'Pioneering digital artists'

2015/04/25 'Visual characteristics'

2015/04/19 'Assessment'

2015/04/1 Content of blog 'Digital Painting' transferred to this webpage


PIONEERING DIGITAL ARTISTS