Lumen light guide

Start

The tool opens with two sample pictures, A and B, and the God rays preset: warm light from above the middle of the frame. The picture fills the frame; the panel sits beside it.

What you need

• A current browser with WebGL. Chrome, Edge, Firefox and Safari all have it.
• Two pictures of your own, if you want them. Any image the browser can open works; the samples are there until you swap them.

Your first result

1. Open Lumen light and tap the picture. The light swings once round the middle of the frame, the shafts turn with it, and it settles back where it started.
2. Press Burn through under Presets, then tap the picture. The frame glows, and picture B opens out from the middle until it fills the frame.
3. Tap again. The run now carries B back into A.
4. Under Sliders, move Light X and Light Y to place the light. See light position.
5. At the top of the panel, press the Image A and Image B tiles to pick your own two pictures, or drop two at once.
6. Press Save PNG for a still, or Record video to keep one full run.

Good to know

• A tap anywhere on the picture plays the same run; it does not move the light. The light sits where Light X and Light Y put it.
• A tap during a run does nothing; wait for it to finish. Replay always starts again at once.
• Moving a slider shows the change at once when no run is playing, and takes the highlight off the preset.
• The frame takes the shape of picture A. Picture B is stretched to that shape, so two pictures of the same shape look best.
• On a phone the controls sit in a bar at the bottom of the screen. Tap the bar to open them.