In this tutorial, it will show you how to create taking photos with long exposures. It would be a nice idea to do that in Photoshop. If the background is too dark the blend mode won't work. You'll probably have to use another one with a outer glow.
日本語: まだ 日本語 版の翻訳はありません。英語で見る — showing the original English article below.
Create a Glowing Light Painting Effect
日本語
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