Hi @Dirk_Klein
In the video, the person uses visibily to “hide” randomly selected panels. check out this topic, I think it will show you how to do that :
However, I don’t thing it’s the best way to randomize a curtain wall facade. I think it would be better to populate the curtain wall with different types of panels as shown in this topic:
John pierson was even nice enough to share his graph 