Holographic security feature on documents — also exploitable as film effect for counterfeit authenticity. Iridescent shift visible only at certain angles.
On set or in post-production, you primarily encounter the kinegram when documents need to be faked—not criminally, but cinematically. The iridescently shimmering hologram on passports, banknotes, or IDs cannot be easily photocopied or replicated with standard VFX. The effect relies on the colors and reflections changing with the camera angle. This is precisely what makes it interesting for scenes where a character scrutinizes a forged passport or the camera glides over a document.
The practical challenge: Kinegrams are physical holograms that react to light. Anyone needing a realistic effect either works with genuine security elements (which are then photographed) or has them reconstructed in 3D. With real documents, the solution on set is often simpler—achieving the correct angle and light capture under camera guidance. The kinegram then displays its characteristic play: colored iridescence, with a depth effect created by the surface structure of the hologram. Camera movement significantly enhances the effect.
In VFX scenes where the kinegram must be generated digitally, it becomes complex. You need specular maps, normal maps, and multi-layered shaders to mimic the iridescent, shiny behavior. Typically, you work with renderers like Arnold or V-Ray, which handle reflective surface structures well. The color shift (iridescence) arises from wavelength-dependent reflection—in rendering, you need special Iridescence Nodes or custom shaders for this. A common mistake: the kinegram looks too "plastic" or "flat" because the depth structure of the hologram is missing.
Practical tip from an editing and color grading perspective: If you're shooting with real material, capture multiple angles. The colors of the kinegram change dramatically—from gold to red to cyan depending on the angle of incidence of light. In the edit, you can later use this for narrative effect: the holographic flicker unconsciously enhances the "fake" authenticity of a forgery. For digital kinegrams in post, you need good key lighting and reflection mapping from the set to credibly integrate the effect. Without the ambient light as a reference, the kinegram appears isolated and artificial.