computer art

My work for ‘DRIVERS’ , a Computer Arts Society (CAS) committee show

| Stephen Bell

In September 2025 an exhibition of work by members of the CAS committee was installed at the London offices of the BCS in Moorgate. I had the privilege of curating the show. As a committee member I also chose to show some work. Having previously used C++ and OpenGL, for the show I used Processing for the first time to produce 3D animations to be screened as well as the images below, which were printed and framed. Two videos were formatted for the four screen video wall. There are links to view them below.

  • Order
  • Freedom
  • Change
  • Oodles of Love

Following the example of colleagues I decided to make some new work, but related to some very old work. After a break of some fifty years, I returned to exploring the algorithms that I used back in the late nineteen-seventies first with physical sculptural constructions at Bristol Poly and then using computer graphics as a postgrad at The Slade. Back then, I used FORTRAN on a Data General Nova minicomputer. This time I used Processing on an iMac.

The algorithm is explained in the pages on my old website about my early computer graphics: https://stephenbell.org.uk/ranstak/index.html

Two videos were made for the four-screen video wall at BCS Moorgate. A matrix of rotating helices of random length, frequency and amplitude provide constantly changing apparent conjunctions and combinations of shape as their overlapping forms coincide. The phases of the piece – where coloured shapes are replaced temporarily by monochrome ones and then replaced in turn by more brightly coloured helices is roughly based upon the menstrual cycle. Each video was generated using a different random number seed for the pseudo-random number generator, leading to different instances of the potential compositions.

View of four screen video wall displaying helical conjunctions video
Looking into a small office with a glass door open and two prints on the wall.

Using Processing, which I only started learning this year, with help from the Google Gemini ‘AI’, rather than using a pen plotter the images are created using on screen rendering of the 3D geometry. A bonus of current technology compared to what I used in the 1970’s is that I can now produce animations of the shapes much more easily.

Very Early plotter drawing

4 x 4 x 4 arrangement of L shaped objects coloured with red pencil
| Stephen Bell

In sorting through my mother’s estate after her recent demise I came across a birthday card that I had made for her when I was first using the computer at The Slade. It would probably have been 1978.

4 x 4 x 4 arrangement of L shaped objects coloured with red pencil

The first project that I did using the computer was based upon the sculptures that I had been making on my undergraduate course at Bristol Polytechnic. I had been arranging ‘modules’ in a regular grid pattern on the ground. Using the computer I was able to arrange them in 3D space without worrying about gravity. Note that the graphics library we used at the time did not have a hidden line removal option, hence the ‘wireframe’ rendering. I began to enjoy the ambiguity caused by the perspective projection of 3D shapes onto the 2D plane of the drawing. Fascinated by the way we see stars as if on a hemispherical surface, I had explored the phenomenon at Bristol with a model of the nearest twenty stars to our sun. I later transferred that data to computer drawings too.

There’s more about my early computer graphics here: https://stephenbell.org.uk/ranstak/index.html

Leicester computer art pioneers

| Stephen Bell

There are a couple of prints of my work in the CAS: Leicester Computer Art Pioneers exhibition at Phoenix Leicester from November 2nd 2023 to January 30th 2024. The curator, Sean Clark, invited me to submit two pieces – one from the period when I was living in Leicester while I was working at the Loughborough University of Technology Computer-Human Interface Research Centre (LUTCHI) and studying for a PhD, and one recent piece. He would take the files I sent to him and produce prints for the show.

For the first piece I chose to combine two images that had been generated using the version of Smallworld that I was using on a Silicon Graphics IRIS workstation that I had borrowed from the centre to use in the shared house I lived in on Humberstone Road. When working on what came to be Prospero and Caliban I seem to remember listening to a radio broadcast of The Tempest. When searching online to find a record of the BBC broadcasting however I couldn’t find a reference to it, so perhaps my memory is playing tricks.

Nevertheless for the second piece I decided to make an image using my current iteration of the behavioural image generation programs that have followed from Smallworld, running on an iMac, to use a similar technique to the one I had been experimenting with when making the Prospero image, i.e. placing the source to illuminate the generated shape in the centre of the composition so that trails in front of the light source would be rendered in silhouette. The result is Miranda. The video below shows a recording of my exploration of the generated shape including the frame that I selected for the print.

The works exploit the perceptual phenomenon referred to as pareidolia, where people think that they can see something that does not actually exist. I have often sought out these phenomena, after learning of the advice of Leonardo da Vinci when I was at school.