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9<title>Texture Filters</title>
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15  <h1>Texture Filters</h1>
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17  <p>A <I>texture filter</I> is an operation that determines the appearance of textures applied to a polygonal model based either on the <I>distance of the model from the viewpoint</I> or the <I>skew</I> relative to the view angle. This section describes the types of texture filters. In addition to the standard texture filters, this section also describes the texture filter types used for <I>mipmaps</I>.</p>
18  <h2>Texture Filter Types</h2>
19  <p>This section describes the types of texture filters.</p>
20  <p>The <I>texture filter</I> refers to the process of reducing jaggies and other artifacts that have been generated in a texture.  For details about texture filtering, see <a href="../../../glossary/index.html#texture_filter">here</a>.</p>
21  <p>The figures below show two types of filtering.</p>
22  <img class="user_guide_chart" src="assets/texture_filter.png" alt="Texture Filters"/>
23  <h2>Texture Filter Types (Using Mipmaps)</h2>
24  <p>This section describes the types of texture filters used for <I>mipmaps</I>.</p>
25  <p>To read details about the <em>mipmaps</em>, see <a href="../../../glossary/index.html#mipmap">here</a>.</p>
26  <!-- #BeginLibraryItem "/Library/glossary_texture_filter_ミップマップmap.lbi" --> <!-- ミップマップテクスチャのテクスチャフィルタ ( Texture Filter_ミップマップmap ) -->
27  <p>If a texture <I>uses mipmaps</I> and is displayed on the screen in <I>enlarged/reduced</I> fashion, you can also specify texture filters that span multiple mipmap levels.</p>
28  <p>The table below lists the filtering methods that can be selected in CreativeStudio when mipmaps are used.</p>
29  <table>
30    <thead>
31      <tr>
32        <th>Filtering Method</th>
33        <th>Description</th>
34      </tr>
35    </thead>
36    <tbody>
37      <tr>
38        <th>Nearest - mipmap - nearest</th>
39        <td>Performs point sampling within the texture image, with no interpolation between mipmap levels.</td>
40      </tr>
41      <tr>
42        <th>Nearest - mipmap - linear</th>
43        <td>Performs point sampling on the texture image, with interpolation between mipmap levels.</td>
44      </tr>
45      <tr>
46        <th>Linear - mipmap - nearest</th>
47        <td>Performs bilinear filtering on the texture image, with no interpolation between mipmap levels.</td>
48      </tr>
49      <tr>
50        <th>Linear - mipmap - linear</th>
51        <td>Performs bilinear sampling on the texture image, with interpolation between mipmap levels.</td>
52      </tr>
53    </tbody>
54  </table>
55  <!-- #EndLibraryItem -->
56  <p>The images below illustrate the appearance of the filtering methods that can be selected in CreativeStudio when mipmaps are used.</p>
57  <img class="user_guide_chart" src="assets/texture_filter_mipmap.png" alt="Mipmap Filtering"/> <!-- #BeginLibraryItem "/Library/performance_ミップマップmap.lbi" --> <!-- ミップマップのパフォーマンス ( performance_ミップマップmap ) -->
58  <p>When using mipmaps, textures are displayed on-screen at a resolution appropriate to the surface area being displayed. You can therefore reduce the load from processing texels, such as when applying a large texture to small screen area. That said, there is still a load incurred  even when using mipmaps when the mipmap level filtering method is configured for smooth interpolation.</p>
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