How to Feather Mask in Photoshop

How to Feather Mask in Photoshop

How to Feather Mask in Photoshopに関心がある方へ、迷わずに進められる 手順書をお届けします。

Imagine you’re cutting out a photo of your best friend on a windy beach. Without feathering, the edge of your cutout is sharp, like a cookie cutter—it screams, “I’m a sticker!” Feathering softens that edge, giving it a gentle fade so the person blends into the new background like butter on warm toast. It’s the difference between a bad wig and a natural hairline.

I once spent an hour painstakingly erasing around a dog’s fluffy ears, only to realize the final image looked like the dog had been scalped. A quick feather fixed the whole disaster. Now, I use it before I even pick up the eraser tool.

Step One: Make Your Selection First

Before you can feather, you need a selection. Grab the Lasso Tool (the one that looks like a tiny lasso rope) or the Quick Selection Tool (the magic wand’s cooler cousin). Do your best to trace around your subject. It won’t be perfect, and that’s totally fine—feathering is here to save you.

Think of this step like wrapping a birthday present. The edges don’t have to be museum-quality because you’re about to add the fluffy, forgiving tape of feathering. The worse your initial selection, the more dramatic the feathering payoff.

Step Two: The Secret Menu—Select & Mask

Here’s where most beginners panic. You don’t actually “feather” by just hitting a button. Instead, go to the top menu and click Select > Select and Mask. This opens a workspace that looks like the cockpit of a spaceship, but don’t be scared. Look at the properties panel on the right. There’s a slider called Feather.

Slide it slowly to the right. You’ll see your sharp edge start to dissolve like morning fog. Start with a low number, like 2 or 5 pixels, if you’re cutting a person. Go higher, like 20 or 30 pixels, for fluffy clouds or cotton candy. I once had a client who insisted on 100 pixels for her profile photo. She looked like a ghost. Don’t be that client.

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Step Three: The “Ah-Ha” Moment

Once the feather looks good, click OK. Now you’re back in the main Photoshop window. If you’ve done everything right, the marching ants (those dotted lines that dance around your selection) will look a bit curvier, softer. Now hit Ctrl+J (or Cmd+J on a Mac) to copy that selection onto a new layer.

The moment you drag a background behind it—say, a tropical beach or a brick wall—the edges will melt. Your subject won’t look like a cutout anymore. They’ll look like they actually belong there. It’s the digital equivalent of a perfectly executed handshake vs. a awkward fist bump.

高橋 健太
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高橋 健太

Webメディアでの編集・執筆歴10年。読者の好奇心を刺激するストーリー作りを心がけています。