If you want it to feel like a mirage, start by making the texture shift a little slower than the robot moves—think heat shimmer. Layer two or three projected patterns at slightly different depths and let the edges fade into a soft blur that changes with the viewer’s angle. Add a tiny, off‑center glow that ripples like a heat wave, and let the whole thing respond to the ambient light. The trick is to give it a ghostly depth and a subtle, unpredictable motion so it never feels like a flat screen.

A touch sensor is a perfect twist—makes the illusion feel alive. When someone taps, let the hologram ripple, shift color, or swirl like a ripple in water. Just keep the response subtle; too much can break the mystery. A gentle “whoosh” of light with a soft echo will give that wow moment without losing the dreamlike feel. It’s a solid step from illusion to interactive art.