Matt Archibald made this film; he writes: ‘An immersive piece of interactive installation art: Colourscape, which came to Stratford Park and made for a very different experience to the rest of The Stroud Fringe Festival 2015. Where seeing isn’t necessarily believing…. and one’s sensory perception is temporarily shifted into another realm.’
See also this longer piece of mystery, sound and colour: https://youtu.be/531JArgCKsQ
And the add about Colourscape coming to Stroud: https://stroudcommunity.tv/something-special-fringe/