I’ve been trawling through charity shops today to find something i can use as a Prism. I found this ‘crystal’ candle holder which i think is going to work really well, and even after getting out studio lights i cannot create a direct enough light, i don’t want to risk starting a fire by putting cardboard over the front. So tomorrow I will book out a projector and use that as light as its really strong and narrow.
( bit of a rubbish image but my camera has no battery)