Well, I suppose you didn’t understand me correctly… I don’t have other layers. I just have a shape (1 layer), and I need some way to make this shape sectionally randomly transparent. Maybe there are some effects suitable for this, or expressions… I could have achieved this effect by creating lot’s of masks or other shapes, but it’s not possible in my situation, firstly, because it’s too messy, and secondly, I need to control the number of these transparent sections. And it is possible only if I deal with just one (or a couple) layers.