How to light paint words with an iPhone

Use an iPhone or iPad as the moving light source and a separate camera to take the picture. Holographium 2026 displays the text or graphic as you move the device through the frame. The open shutter collects the light into one photograph.

Plan the shutter and sweep

Your camera should open before you start moving and close after you finish. Holographium’s sweep can run for 3 to 30 seconds in half-second steps. Its separate countdown gives you time to get into position.

For example, a 10-second exposure with one second on either side leaves an 8-second sweep. A longer exposure also records more ambient light, so check a test photo before committing to the timing.

Take the first photo

Put the camera on a tripod or steady surface. Dim the room, compose the frame, and focus on the place where you’ll hold the screen.
Start with one short word in Holographium. Set the sweep and rehearse moving the screen smoothly from left to right at the distance shown on the app’s display.
Use the countdown to get ready. Open the camera shutter just before the sweep, then keep moving until the sweep is complete. Take a test photo and adjust one thing at a time.

Fix a test shot

Part of the word is missing: Check that the screen stays in frame and that the full sweep fits inside the open shutter.
Letters look stretched or squeezed: Rehearse an even pace across the full sweep distance. Holographium offers interval and halfway cues to help.
The background is too bright: Reduce ambient light or adjust your camera settings. If you shorten the exposure, recalculate the sweep before trying again.

Taptanium makes Holographium 2026. Its App Store listing documents the sweep range, countdown, and camera requirements. See the App Store listing.