You will know this if you work with glass on a regular basis.... over time, a lot of leftovers from individual projects accumulate and not just small shards....
This light fixture was created from such a batch of glass. I had a few larger sections of Wissmach clear glass textures available ( Wissmach 01 MOSS, Ripple, 01 StreamX and Hammer). I cut these into narrow strips ( 28mm ), for this round light.
Assembling the parts into a truly round cylinder looks harder than it is - you just have to know how to help yourself. For more details, see the instructions and pattern.