YARN at Bolton's “Put Big Light On” Festival

Bolton Town Hall, Bolton

Creative studio Novak approached Graymatter Video to provide the technical design and system delivery for YARN, a stunning large-scale projection artwork set to illuminate Bolton’s iconic Town Hall in December 2024. Featuring original music by Ed Carter, YARN was conceived as a captivating audiovisual experience, transforming the Town Hall façade into a moving tapestry of vibrant colour, dynamic motion, and immersive sound.



The installation was commissioned as part of the “Put Big Light On” Festival, honouring Bolton’s rich journey from a modest rural market town to a pivotal force in the Industrial Revolution. Through vivid animations and powerful storytelling, YARN celebrated the town’s renowned mill production, visionary designers, historic landmarks, and modern role as Greater Manchester’s Town of Culture.

The Challenge: Tackling Scale and Complexity

The Town Hall’s vast façade (50m wide, 61m high), dark stone surface, and detailed architecture, including towering portico pillars and a prominent clock tower, posed major challenges. Achieving the creative vision required 150–180 LUX brightness, perfect projection across three building sides, and seamless integration of the staircase, all while avoiding shadows and maintaining flawless clarity.

The Solution: Precision-Delivered LED Technology

We delivered a robust system using ten Panasonic RQ35k and four RZ21k projectors, paired with our disguise GX 3 media servers and advanced 3D mapping to handle the complex structure. A network of Lightware HDMI fibre extenders and a 24 x 24 matrix ensured synchronised, high-bandwidth delivery. For audio, we installed a d&b Audio Y series line array, delivering Ed Carter’s score with immersive clarity. Five custom weatherproof towers secured the installation and provided optimal projection angles.


The result was a breathtaking fusion of light, sound, and storytelling. YARN captivated thousands of visitors, transforming Bolton Town Hall into a mesmerising visual and audio experience that celebrated the town’s industrial roots, cultural icons, and creative future. Our expert technical delivery ensured Novak’s artistic vision came to life, proving the power of collaboration between creativity and precision engineering.

Equipment used:

  • 10x Panasonic RQ35k Projectors
  • 4x Panasonic RZ21k Projectors
  • disguise GX 3 Media Servers
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If you’re planning a projection mapping project and have approached several suppliers for costs, you may find yourself looking at quotes that vary considerably. One supplier might recommend a certain number of projectors, another might specify twice as many, and the difference in cost can be significant. On paper, however, both proposals might appear to offer exactly the same thing: projection mapping a building. So, what are you actually comparing? The reality is that not all projection mapping quotes are created equal . Two technical proposals can promise to cover the same building with the same content, yet deliver very different results when the show goes live. And when the whole reason for investing in projection mapping is to create impact, attract attention and make people stop and look, the quality of that final result really matters. Our expert Graymatter Video team approach projection mapping by working backwards from the experience we want the audience to have. Rather than asking simply whether we can put an image onto a particular surface, we look at what is required to make that image bright, clear and impactful in the real-world environment. That distinction can make all the difference. What Makes Great Projection Mapping? At its best, projection mapping has an extraordinary ability to transform a familiar space. Architecture can appear to move, disappear or change shape. A historic façade can become part of an animated story. A landmark building can be transformed into a huge canvas for a brand activation. The technology behind those experiences should almost disappear. The audience shouldn't be thinking about projector quantities, lenses, media servers or light levels. They should simply be experiencing the creative. But making something look effortless can require a significant amount of technical planning behind the scenes. For the illusion to work, the projection needs enough brightness, clarity and consistency to work with the building and compete with the surrounding environment. If the image is too faint or lacks contrast, even exceptional content can lose its impact. That is why a good projection mapping system starts with understanding the location and the creative ambition, rather than simply selecting a projector. Why Brightness Matters in Projection Mapping One of the most important considerations in any projection mapping project is brightness. At Graymatter Video, one of the key measurements we use when designing a projection system is brightness, which we measure in lux. Put simply, lux helps us understand how much light is actually reaching the surface we are projecting onto. This is important because projector specifications alone don't tell the whole story. A projector may have an impressive lumen output, but the audience isn't standing inside the projector reading its specification sheet. They're looking at a building, sometimes from hundreds of metres away, surrounded by other sources of light. The characteristics of that building can have a huge effect on the finished image. A relatively smooth, light-coloured surface will behave very differently from dark brick, stone or highly textured architecture. The size of the façade, distance between the projectors and building, projection angle and available projector positions all influence the eventual result. Then there is the surrounding environment. Streetlights, architectural lighting, illuminated signage and neighbouring buildings can all compete with the projected image. Even the time of year and the location itself can influence how a system needs to be designed.All of these factors help determine how much projection power is actually required. 
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