Analogue and digital media
A medium (plural: media) is the material or tool an artist uses. Analogue media are physical: pencil, paint, clay, photographic film, printmaking. Each mark is unique and has texture you can touch.
Digital media store everything as numbers (0s and 1s). A digital image is a grid of pixels; each pixel holds a colour code made of red, green and blue (RGB) values.
Features of digital media: perfect copies, easy changes and undo, fast sharing, mixing image, sound, motion and interaction. Limits: needs devices and power, files can be lost, screens look different, and originality and copyright are harder to protect.
Raster vs vector, resolution and file formats
Raster (bitmap) images store every pixel: photos and digital paintings. Resolution is the number of pixels (e.g. 1920 × 1080) or pixels per inch for printing. Enlarging a raster image too much makes it blocky (pixelated). Formats: JPG, PNG, GIF.
Vector images store shapes as points, lines and curves with maths. They scale to any size without losing sharpness: good for logos, icons and fonts. Formats: SVG, PDF.
Common software types: raster painting and photo editing, vector drawing, 3D modelling, animation and video editing, and creative coding.
Digital tools: layers, brushes and tablets
- Layers: separate transparent sheets (background, sketch, colour, light) that can be edited, hidden or moved one at a time.
- Brushes: imitate pencil, ink, watercolour or oil, or make effects no real brush can.
- Pen tablet / stylus: senses pressure and tilt, so lines get thicker or thinner like real drawing.
- Selection, transform, filters: cut out parts, resize, rotate, change colours.
- Undo and history: try ideas without fear.
Good habit: keep the original file with layers, and save copies for sharing.
Combining analogue and digital
Many artists move between hand and screen:
- Sketch or paint on paper.
- Scan or photograph it.
- Clean, colour or collage it digitally.
- Print it on paper, fabric or wood, or project it.
- Paint, stitch or draw again over the print.
Other mixes: photos of clay models turned into stop-motion animation, digital patterns cut by laser into wood, or hand-drawn frames coloured on a computer. The mix keeps the warmth of handmade marks and the flexibility of digital tools.
Media art: video, light, interaction and code
Media art uses technology itself as the material.
- Video art: from the 1960s, artists used TV sets and video cameras. Nam June Paik, born in Korea, built sculptures and walls from many TV screens.
- Generative art: the artist writes rules in code and the computer draws; pioneers such as Vera Molnár began in the 1960s.
- Projection mapping and light art: images shaped to fit buildings or objects.
- Interactive installations: the work changes when visitors move, touch or speak.
- Net art, game art, VR and AI-assisted images: new questions about who the author is and what is original.
When you look at media art, ask: What is the medium? How does the viewer take part? What does the technology add to the meaning?
Key formulas and definitions
- Pixel: the smallest square of a digital image, with an RGB colour
- Resolution = width in pixels × height in pixels (e.g. 1920 × 1080 ≈ 2.1 million pixels)
- Raster = pixels (JPG, PNG); Vector = points and curves (SVG, PDF)
- Layer: a separate transparent sheet in a digital artwork
- Media art: art that uses screens, light, sound, code or interaction as its material
- Generative art: art produced by rules (code) set by the artist
Worked examples
1. A school wants a logo for banners and badges. Raster or vector? Why?
Vector, because it must look sharp both tiny on a badge and huge on a banner.
2. An image is 1000 × 800 pixels. How many pixels does it have?
1000 × 800 = 800 000 pixels.
3. Describe a workflow that combines analogue and digital for a festival poster.
Draw the lettering with ink, scan it, add colour and photos in layers, print on card, then add glitter or paint by hand.
4. How is a video wall made of many TVs different from a painting?
It moves and changes in time, uses light from screens, can show many images at once, and depends on electricity and technology; the viewer may walk around it.
5. Why might a digital painter paint shadows on a separate layer?
So the shadows can be made lighter, recoloured or deleted later without spoiling the colours underneath.
Common mistakes
- Thinking digital art needs no skill. Drawing, colour and composition still matter; only the tools change.
- Enlarging a small raster image for a big print. It becomes blurry or blocky; start with enough resolution or use vector.
- Thinking analogue and digital are opposites. Many works combine them.
- Using any image from the internet freely. Images are protected by copyright; use your own, ask, or use openly licensed ones and give credit.