Glitch effects break the picture the way damaged digital video does.
- Datamosh drags the picture along its own movement instead of updating it, like a video with its keyframes cut out.
- Block Crunch breaks the picture into blocks that slide, repeat and flatten into a few colors.
Their order in the Insert FX chain matters: Block Crunch before Datamosh smears the broken blocks, Datamosh before Block Crunch breaks up the smear.