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157 lines
8.3 KiB
157 lines
8.3 KiB
2 years ago
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<!DOCTYPE html>
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta name="viewport" content="width=device-width, minimum-scale=1.0, maximum-scale=1.0, initial-scale=1.0" />
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<title>Photopea - Masks</title>
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<link rel="stylesheet" href="https://blog.photopea.com/wp-content/themes/simplex/style.css" type="text/css" media="screen" />
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<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:400,400i,700,700i" />
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</head>
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<body>
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<div id="page">
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<div id="header">
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<a href="index.html" class="title">Learn Photopea</a>
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<!--<p>Web-based image editor.</p>-->
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<a href="https://blog.photopea.com">Blog</a> |
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<a class="curr" href="index.html">Learn</a> |
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<a href="../tuts/index.html">Tutorials</a> |
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<a href="../api/index.html">API</a> |
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<a href="https://www.facebook.com/photopea">Facebook</a> |
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<a href="https://www.twitter.com/photopeacom">Twitter</a>
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</div>
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<div id="main" style="max-width:1000px;">
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<div id="sidebar" style="width:22%;">
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<h3>Topics</h3>
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<ul>
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<li class="lvl0"><a href="index.html">Introduction</a></li>
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<li class="lvl0"><a href="workspace.html">Workspace</a></li>
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<li class="lvl1"><a href="opening-saving.html">Open and Save</a></li>
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<li class="lvl1"><a href="navigation.html">Navigation</a></li>
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<li class="lvl1"><a href="image-size.html">Image size</a></li>
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<li class="lvl0"><a href="layers.html">Layers</a></li>
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<li class="lvl1 active"><a href="masks.html">Masks</a></li>
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<li class="lvl1"><a href="layer-styles.html">Layer Styles</a></li>
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<li class="lvl1"><a href="smart-objects.html">Smart Objects</a></li>
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<li class="lvl1"><a href="other-layers.html">Other Layers</a></li>
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<li class="lvl0"><a href="layer-manipulation.html">Layer Editing</a></li>
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<li class="lvl1"><a href="free-transform.html">Free Transform</a></li>
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<li class="lvl1"><a href="adjustments-filters.html">Adjust. & Filters</a></li>
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<li class="lvl0"><a href="selections.html">Selections</a></li>
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<li class="lvl1"><a href="creating-selections.html">Make Selections</a></li>
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<li class="lvl1"><a href="advanced-selecting.html">Advanced Selecting</a></li>
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<li class="lvl1"><a href="refine-edge.html">Refine Edge</a></li>
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<li class="lvl1"><a href="moving-selected-data.html">Move Selected Data</a></li>
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<li class="lvl0"><a href="brush-tools.html">Brush Tools</a></li>
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<li class="lvl1"><a href="bt-basic.html">Basic Tools</a></li>
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<li class="lvl1"><a href="bt-advanced.html">Advanced Tools</a></li>
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<li class="lvl1"><a href="bt-smart.html">Smart Tools</a></li>
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<li class="lvl0"><a href="text.html">Text</a></li>
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<li class="lvl1"><a href="text-style.html">Text Style</a></li>
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<li class="lvl0"><a href="vector-graphics.html">Vector Graphics</a></li>
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<li class="lvl1"><a href="vg-structure.html">The Structure</a></li>
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<li class="lvl1"><a href="vg-manipulation.html">Editing Shapes</a></li>
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<li class="lvl1"><a href="vg-creating.html">Creating Shapes</a></li>
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<li class="lvl0"><a href="other.html">Other</a></li>
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<li class="lvl1"><a href="guides-grid-snapping.html">Guides & Snapping</a></li>
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<li class="lvl1"><a href="animations.html">Animations</a></li>
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<li class="lvl1"><a href="layer-comps.html">Layer Comps</a></li>
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<li class="lvl1"><a href="scripts.html">Scripts</a></li>
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</ul>
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</div>
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<div id="content" style="width:78%;">
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<div class="post">
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<h1>Masks</h1>
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<p>We already know layers. They are building blocks of our document.
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Sometimes, we need to hide a part of the layer (so it is not shown in the result), without deleting the actual pixel data.
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In Photopea (and many other editors), it can be done with <b>masks</b>.</p>
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<p>We can think of a layer mask as an extra image, attached to the layer. It has the same size
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as that layer (so each pixel of the mask has a corresponding pixel in the layer). The mask does not have colors -
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it can be back and white only. The black color means, that corresponding pixels of the layer are hidden, while the white color means,
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that corresponding pixels of the layer are preserved. Precisely, masks can have many shades of gray,
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and produce many levels of transparency.</p>
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<img src="https://i.imgur.com/J4HHczM.png" class="fullw" />
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<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>
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<ins class="adsbygoogle"
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data-ad-layout="in-article"
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data-ad-format="fluid"
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data-ad-client="ca-pub-0885095539348241"
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data-ad-slot="5352893134"></ins>
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<script> (adsbygoogle = window.adsbygoogle || []).push({}); </script>
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<h2>Working with masks</h2>
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<p>There are <b>raster masks</b> and <b>vector masks</b> (the difference will be explained later).
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Each layer can have at most one raster mask and at most one vector mask. Folders can also have masks
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(in that case, the mask is applied to the whole content of the folder).
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We can add a new mask to the active layer using Layer - Raster Mask - Add (or Layer - Vector Mask - Add).
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Masks can be deleted through Layer - Raster Mask - Delete (or Layer - Vector Mask - Delete).</p>
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<p>Thumbnails of new masks will appear next to the thumbnail of the layer.</p>
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<img src="https://i.imgur.com/MPZrmpF.png" />
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<p>We can <b>enable</b> or <b>disable</b> each mask. When the mask is disabled, it has no effect on the image.
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It can be enabled again at any time. Right-click the thumbnail of the mask and choose Enable / Disable,
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or simply click the thumbnail of the mask with the Shift key pressed.</p>
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<p>Any change to the layer (e.g. drawing with a Brush tool, rotation etc.) can be applied to the mask, too.
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Click the main thumbnail, or the thumbnail of the mask, to choose, what you want to edit.</p>
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<p>Masks can be <b>linked</b> to the main content of the layer. It means, that when you move the main content, the mask is moved too, and if you move the mask,
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the main content is also moved. The link is represented by the chain icon on the left side of the thumbnail of the mask (each mask has its own link).
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Click the chain icon to link or unlink the mask.</p>
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<h2>Properties of the mask</h2>
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<p>When you select a mask and open the <b>Properties</b> panel in the sidebar (or double-click the thumbnail of the mask),
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you can see some properties of the mask. The <b>Density</b> specifies the "opacity" of the mask (100% corresponds to a regular masking,
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0% corresponds to no mask, values in between can be useful too). The next property is <b>Feather</b>, which adds a blur to the mask
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(i.e. it removes sharp edges between white and black areas of the mask).
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Note, that these properties do not change the actual content of the mask.
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They are used automatically, when the mask is applied to the image.</p>
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<h2>Raster and Vector masks</h2>
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<p>There are two kinds of masks: raster masks and vector masks. The difference is in the way how each kind is created and represented.</p>
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<p>The <b>raster mask</b> is a simple grayscale image, that consists of pixels. Each tool, that can be applied to a regular layer (e.g. Brush, Eraser, Smudge, fill of the selection etc.)
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can also be applied to the raster mask, with the only difference, that all colors will become shades of gray.</p>
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<p>The <b>vector mask</b> consists of vector shapes, that are made of Bézier curves. You create it and work with it as with a vector object
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(by editing Bézier curves). These vector shapes are internally converted to a grayscale image and applied to the layer automatically.
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You can learn more in the <a href="vector-graphics.html">chapter about vector graphics</a>.</p>
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</div>
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<h2 style="margin-top: 4em">Comments</h2>
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