Film a clip through reeded architectural glass after the fact. Vertical ribs slice the picture into repeated, bent strips; people walking behind the glass smear into columns of color.
Spacing and refraction
Flute Spacing sets the rib width. Wide ribs give bold architectural stripes; narrow ribs turn the picture into fine vertical texture. Refraction Force sets how strongly each rib bends what lies behind it. Low force keeps shapes readable, high force breaks them into abstract bands.
Motion behind glass
Because the ribs stay still while the picture moves, horizontal motion is broken into a rhythm of reappearing slices. Soft, colorful footage such as city lights at night or a moving crowd makes the most convincing background loops.