Specialty print process using micro-lens sheets—creates 3D effect or image shift depending on viewing angle. Used for film posters and in-camera optical effects.
You know this from old movie posters: you walk past, the image changes depending on the angle, or it pops out in 3D. This is lenticular printing — and it works with tiny, parallel lenses embossed onto a special film. Each of these microlenses deflects light so that different image information becomes visible depending on the viewing angle. In the film industry, you primarily need this process for marketing materials, but such techniques also play a role in certain in-camera effects.
In practice, it works like this: you use lenticular sheets applied to print media. The printing itself must be done with high precision — the image strips must be positioned exactly under the individual lenses, otherwise, a blurry or flickering result will occur. For film posters, for example, you create several image versions (usually 3 to 4), which are then placed on top of each other in register printing. The viewer sees different scenes or effects depending on how they look at the poster. This works without special glasses and creates a tangible visual effect that attracts attention in cinema marketing.
For in-camera use, the application is more specialized: you could, for example, position lenticular sheets in front of the camera as an effect element to create multiple images or stereoscopic effects. However, this is rare and requires precise calibration and lighting. Focus and depth of field play a critical role — small errors in the optics make the effect unusable. Some directors also use the process for special transitions or as a visual stylistic device.
Important to understand: Lenticular printing is not digital trickery. It is purely optical-mechanical. This makes it robust and reliable on the one hand, but also expensive in production and manufacturing on the other. The printing process requires specialized printers with equipment and experience — standard print shops cannot do this. Color space and exposure must be precisely corrected during typesetting, as the lens structure influences color perception. For marketing, therefore, you need close coordination with specialized lenticular houses.