Bringing marble sculpture photos to life with the multiply blend in iOS.
White marble sculptures (especially reliefs) can look flat and lifeless in natural light. It’s a shame, since these are often amazing, lifelike works. Conventional controls, like exposure and contrast tend to make matters worse. But there’s a blending technique called multiply that can enrich white marble in diffuse light, saturating subtle colors and adding a very real dimension to the stone.
What’s the multiply effect?
Multiply is a blend effect that multiplies the values of corresponding pixels in two images. When two identical images are blended using multiply, you get a progressive darkening. Multiply slightly darkens the highlights in the marble, while more deeply darkening the shadows. Since 2/3 of light values are highlights, there are plenty of tones in marble that the multiply effect can use to enliven carved stone.
How to use the multiply blend.
Here’s the process:
- Open Image Blender.
- Tap the Background square on the bottom left and choose your image.
- Tap the Foreground square on the bottom right and choose the same image.
- Tap the double squares icon at the top center.
- Tap Multiply and swipe down on iPhone (on iPad: tap Multiply and touch the screen).
- Drag the slider right until the restoration looks good.
- Tap the Share icon (square with up arrow).
- Tap Save Image.
A few notes on the multiply effect.
- It doesn’t work on areas of pure white. These don’t multiply, so the pure white areas can look awkwardly bright.
- It emphasizes weathering. Over the years, marble statues on graves get weathered. The multiply blend makes this more pronounced, sometimes distracting from the realism and sometimes adding to it.
- The effect doesn’t work on granite. It emphasizes the speckles.
- You can adjust images in Image Blender. You can modify exposure, contrast and saturation of either photo. So if you want a brighter or less saturated result, reduce the contrast and saturation of one photos. To access the filters, tap the thumbnail on the bottom right or left and choose Filter.
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