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Code Editor : materials.html

<!DOCTYPE html><html lang="en"><head>
    <meta charset="utf-8">
    <title>Materials</title>
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<p>The <code class="notranslate" translate="no">shininess</code> setting of the <a href="/docs/#api/en/materials/MeshPhongMaterial"><code class="notranslate" translate="no">MeshPhongMaterial</code></a> determines the <em>shininess</em> of the specular highlight. It defaults to 30.</p>
<div class="spread">
  <div>
    <div data-diagram="MeshPhongMaterialShininess0"></div>
    <div class="code">shininess: 0</div>
  </div>
  <div>
    <div data-diagram="MeshPhongMaterialShininess30"></div>
    <div class="code">shininess: 30</div>
  </div>
  <div>
    <div data-diagram="MeshPhongMaterialShininess150"></div>
    <div class="code">shininess: 150</div>
  </div>
</div>

<p>Note that setting the <code class="notranslate" translate="no">emissive</code> property to a color on either a
<a href="/docs/#api/en/materials/MeshLambertMaterial"><code class="notranslate" translate="no">MeshLambertMaterial</code></a> or a <a href="/docs/#api/en/materials/MeshPhongMaterial"><code class="notranslate" translate="no">MeshPhongMaterial</code></a> and setting the <code class="notranslate" translate="no">color</code> to black
(and <code class="notranslate" translate="no">shininess</code> to 0 for phong) ends up looking just like the <a href="/docs/#api/en/materials/MeshBasicMaterial"><code class="notranslate" translate="no">MeshBasicMaterial</code></a>.</p>
<div class="spread">
  <div>
    <div data-diagram="MeshBasicMaterialCompare"></div>
    <div class="code">
      <div>Basic</div>
      <div>color: 'purple'</div>
    </div>
  </div>
  <div>
    <div data-diagram="MeshLambertMaterialCompare"></div>
    <div class="code">
      <div>Lambert</div>
      <div>color: 'black'</div>
      <div>emissive: 'purple'</div>
    </div>
  </div>
  <div>
    <div data-diagram="MeshPhongMaterialCompare"></div>
    <div class="code">
      <div>Phong</div>
      <div>color: 'black'</div>
      <div>emissive: 'purple'</div>
      <div>shininess: 0</div>
    </div>
  </div>
</div>

<p>Why have all 3 when <a href="/docs/#api/en/materials/MeshPhongMaterial"><code class="notranslate" translate="no">MeshPhongMaterial</code></a> can do the same things as <a href="/docs/#api/en/materials/MeshBasicMaterial"><code class="notranslate" translate="no">MeshBasicMaterial</code></a>
and <a href="/docs/#api/en/materials/MeshLambertMaterial"><code class="notranslate" translate="no">MeshLambertMaterial</code></a>? The reason is the more sophisticated material
takes more GPU power to draw. On a slower GPU like say a mobile phone
you might want to reduce the GPU power needed to draw your scene by
using one of the less complex materials. It also follows that if you
don't need the extra features then use the simplest material. If you don't
need the lighting and the specular highlight then use the <a href="/docs/#api/en/materials/MeshBasicMaterial"><code class="notranslate" translate="no">MeshBasicMaterial</code></a>.</p>
<p>The <a href="/docs/#api/en/materials/MeshToonMaterial"><code class="notranslate" translate="no">MeshToonMaterial</code></a> is similar to the <a href="/docs/#api/en/materials/MeshPhongMaterial"><code class="notranslate" translate="no">MeshPhongMaterial</code></a>
with one big difference. Rather than shading smoothly it uses a gradient map
(an X by 1 texture) to decide how to shade. The default uses a gradient map
that is 70% brightness for the first 70% and 100% after but you can supply your
own gradient map. This ends up giving a 2 tone look that looks like a cartoon.</p>
<div class="spread">
  <div data-diagram="MeshToonMaterial"></div>
</div>

<p>Next up there are 2 <em>physically based rendering</em> materials. Physically Based
Rendering is often abbreviated PBR.</p>
<p>The materials above use simple math to make materials that look 3D but they
aren't what actually happens in real world. The 2 PBR materials use much more
complex math to come close to what actually happens in the real world.</p>
<p>The first one is <a href="/docs/#api/en/materials/MeshStandardMaterial"><code class="notranslate" translate="no">MeshStandardMaterial</code></a>. The biggest difference between
<a href="/docs/#api/en/materials/MeshPhongMaterial"><code class="notranslate" translate="no">MeshPhongMaterial</code></a> and <a href="/docs/#api/en/materials/MeshStandardMaterial"><code class="notranslate" translate="no">MeshStandardMaterial</code></a> is it uses different parameters.
<a href="/docs/#api/en/materials/MeshPhongMaterial"><code class="notranslate" translate="no">MeshPhongMaterial</code></a> had a <code class="notranslate" translate="no">shininess</code> setting. <a href="/docs/#api/en/materials/MeshStandardMaterial"><code class="notranslate" translate="no">MeshStandardMaterial</code></a> has 2
settings <code class="notranslate" translate="no">roughness</code> and <code class="notranslate" translate="no">metalness</code>.</p>
<p>At a basic level <a href="/docs/#api/en/materials/MeshStandardMaterial#roughness"><code class="notranslate" translate="no">roughness</code></a> is the opposite
of <code class="notranslate" translate="no">shininess</code>. Something that has a high roughness, like a baseball doesn't
have hard reflections whereas something that's not rough, like a billiard ball,
is very shiny. Roughness goes from 0 to 1.</p>
<p>The other setting, <a href="/docs/#api/en/materials/MeshStandardMaterial#metalness"><code class="notranslate" translate="no">metalness</code></a>, says
how metal the material is. Metals behave differently than non-metals. 0
for non-metal and 1 for metal.</p>
<p>Here's a quick sample of <a href="/docs/#api/en/materials/MeshStandardMaterial"><code class="notranslate" translate="no">MeshStandardMaterial</code></a> with <code class="notranslate" translate="no">roughness</code> from 0 to 1
across and <code class="notranslate" translate="no">metalness</code> from 0 to 1 down.</p>
<div data-diagram="MeshStandardMaterial" style="min-height: 400px"></div>

<p>The <a href="/docs/#api/en/materials/MeshPhysicalMaterial"><code class="notranslate" translate="no">MeshPhysicalMaterial</code></a> is same as the <a href="/docs/#api/en/materials/MeshStandardMaterial"><code class="notranslate" translate="no">MeshStandardMaterial</code></a> but it
adds a <code class="notranslate" translate="no">clearcoat</code> parameter that goes from 0 to 1 for how much to
apply a clearcoat gloss layer and a <code class="notranslate" translate="no">clearCoatRoughness</code> parameter
that specifies how rough the gloss layer is.</p>
<p>Here's the same grid of <code class="notranslate" translate="no">roughness</code> by <code class="notranslate" translate="no">metalness</code> as above but with
<code class="notranslate" translate="no">clearcoat</code> and <code class="notranslate" translate="no">clearCoatRoughness</code> settings.</p>
<div data-diagram="MeshPhysicalMaterial" style="min-height: 400px"></div>

<p>The various standard materials progress from fastest to slowest
<a href="/docs/#api/en/materials/MeshBasicMaterial"><code class="notranslate" translate="no">MeshBasicMaterial</code></a> ➡ <a href="/docs/#api/en/materials/MeshLambertMaterial"><code class="notranslate" translate="no">MeshLambertMaterial</code></a> ➡ <a href="/docs/#api/en/materials/MeshPhongMaterial"><code class="notranslate" translate="no">MeshPhongMaterial</code></a> ➡
<a href="/docs/#api/en/materials/MeshStandardMaterial"><code class="notranslate" translate="no">MeshStandardMaterial</code></a> ➡ <a href="/docs/#api/en/materials/MeshPhysicalMaterial"><code class="notranslate" translate="no">MeshPhysicalMaterial</code></a>. The slower materials
can make more realistic looking scenes but you might need to design
your code to use the faster materials on low powered or mobile machines.</p>
<p>There are 3 materials that have special uses. <a href="/docs/#api/en/materials/ShadowMaterial"><code class="notranslate" translate="no">ShadowMaterial</code></a>
is used to get the data created from shadows. We haven't
covered shadows yet. When we do we'll use this material
to take a peek at what's happening behind the scenes.</p>
<p>The <a href="/docs/#api/en/materials/MeshDepthMaterial"><code class="notranslate" translate="no">MeshDepthMaterial</code></a> renders the depth of each pixel where
pixels at negative <a href="/docs/#api/en/cameras/PerspectiveCamera#near"><code class="notranslate" translate="no">near</code></a> of the camera are 0 and negative <a href="/docs/#api/en/cameras/PerspectiveCamera#far"><code class="notranslate" translate="no">far</code></a> are 1. Certain special effects can use this data which we'll
get into at another time.</p>
<div class="spread">
  <div>
    <div data-diagram="MeshDepthMaterial"></div>
  </div>
</div>

<p>The <a href="/docs/#api/en/materials/MeshNormalMaterial"><code class="notranslate" translate="no">MeshNormalMaterial</code></a> will show you the <em>normals</em> of geometry.
<em>Normals</em> are the direction a particular triangle or pixel faces.
<a href="/docs/#api/en/materials/MeshNormalMaterial"><code class="notranslate" translate="no">MeshNormalMaterial</code></a> draws the view space normals (the normals relative to the camera).
<span style="background: red;" class="color">x is red</span>,
<span style="background: green;" class="dark-color">y is green</span>, and
<span style="background: blue;" class="dark-color">z is blue</span> so things facing
to the right will be <span style="background: #FF7F7F;" class="color">pink</span>,
to the left will be <span style="background: #007F7F;" class="dark-color">aqua</span>,
up will be <span style="background: #7FFF7F;" class="color">light green</span>,
down will be <span style="background: #7F007F;" class="dark-color">purple</span>,
and toward the screen will be <span style="background: #7F7FFF;" class="color">lavender</span>.</p>
<div class="spread">
  <div>
    <div data-diagram="MeshNormalMaterial"></div>
  </div>
</div>

<p><a href="/docs/#api/en/materials/ShaderMaterial"><code class="notranslate" translate="no">ShaderMaterial</code></a> is for making custom materials using the three.js shader
system. <a href="/docs/#api/en/materials/RawShaderMaterial"><code class="notranslate" translate="no">RawShaderMaterial</code></a> is for making entirely custom shaders with
no help from three.js. Both of these topics are large and will be
covered later.</p>
<p>Most materials share a bunch of settings all defined by <a href="/docs/#api/en/materials/Material"><code class="notranslate" translate="no">Material</code></a>.
<a href="/docs/#api/en/materials/Material">See the docs</a>
for all of them but let's go over two of the most commonly used
properties.</p>
<p><a href="/docs/#api/en/materials/Material#flatShading"><code class="notranslate" translate="no">flatShading</code></a>:
whether or not the object looks faceted or smooth. default = <code class="notranslate" translate="no">false</code>.</p>
<div class="spread">
  <div>
    <div data-diagram="smoothShading"></div>
    <div class="code">flatShading: false</div>
  </div>
  <div>
    <div data-diagram="flatShading"></div>
    <div class="code">flatShading: true</div>
  </div>
</div>

<p><a href="/docs/#api/en/materials/Material#side"><code class="notranslate" translate="no">side</code></a>: which sides of triangles to show. The default is <code class="notranslate" translate="no">THREE.FrontSide</code>.
Other options are <code class="notranslate" translate="no">THREE.BackSide</code> and <code class="notranslate" translate="no">THREE.DoubleSide</code> (both sides).
Most 3D objects drawn in three are probably opaque solids so the back sides
(the sides facing inside the solid) do not need to be drawn. The most common
reason to set <code class="notranslate" translate="no">side</code> is for planes or other non-solid objects where it is
common to see the back sides of triangles.</p>
<p>Here are 6 planes drawn with <code class="notranslate" translate="no">THREE.FrontSide</code> and <code class="notranslate" translate="no">THREE.DoubleSide</code>.</p>
<div class="spread">
  <div>
    <div data-diagram="sideDefault" style="height: 250px;"></div>
    <div class="code">side: THREE.FrontSide</div>
  </div>
  <div>
    <div data-diagram="sideDouble" style="height: 250px;"></div>
    <div class="code">side: THREE.DoubleSide</div>
  </div>
</div>

<p>There's really a lot to consider with materials and we actually still
have a bunch more to go. In particular we've mostly ignored textures
which open up a whole slew of options. Before we cover textures though
we need to take a break and cover
<a href="setup.html">setting up your development environment</a></p>
<div class="threejs_bottombar">
<h3>material.needsUpdate</h3>
<p>
This topic rarely affects most three.js apps but just as an FYI...
Three.js applies material settings when a material is used where "used"
means "something is rendered that uses the material". Some material settings are
only applied once as changing them requires lots of work by three.js.
In those cases you need to set <code class="notranslate" translate="no">material.needsUpdate = true</code> to tell
three.js to apply your material changes. The most common settings
that require you to set <code class="notranslate" translate="no">needsUpdate</code> if you change the settings after
using the material are:
</p>
<ul>
  <li><code class="notranslate" translate="no">flatShading</code></li>
  <li>adding or removing a texture
    <p>
    Changing a texture is ok, but if want to switch from using no texture
    to using a texture or from using a texture to using no texture
    then you need to set <code class="notranslate" translate="no">needsUpdate = true</code>.
    </p>
    <p>In the case of going from texture to no-texture it is often
    just better to use a 1x1 pixel white texture.</p>
  </li>
</ul>
<p>As mentioned above most apps never run into these issues. Most apps
do not switch between flat shaded and non flat shaded. Most apps also
either use textures or a solid color for a given material, they rarely
switch from using one to using the other.
</p>
</div>

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Code Editor : materials.html