An effective poster pairs something recognizable with an unexpected presentation to hold the viewer

Rodenbröker frames a design principle from semiotics: a generative poster (especially for social media) must give viewers something they can recognize combined with a presentation they don’t expect. He calls this ‘touching the heart’ — pure decoration carrying no information or reference fails the test. The tension between a known subject (an erupting volcano) and an unexpected form (type sliding on a tan wave, rasterization, color-wave blending) is what makes a viewer stop and look. In practice this constrains composition: keep text at least partially legible and keep some recognizable reference even when the image is heavily transformed.

Examples

Familiar volcano photo + bold type moving on a tan wave = engagement. Fully abstract motion with no recognizable element = ‘just decoration’ that fails the test, so Rodenbröker pulls the text back toward legibility.

Assessment

By this semiotics framing, why does a visually impressive but purely abstract animation fail, and name one compositional decision in the tutorial that applies the principle.