# Beast - Advanced Tessellation Shader
[**Beast**](https://assetstore.unity.com/packages/vfx/shaders/beast-advanced-tessellation-shader-82066?aid=1011lvgVb) tessellation shader is integrated into Unity's default **Standard** (for Built-in RP) and **Lit** (for Universal RP) shaders and extends them with tessellation and displacement features:
## Tessellation Types
**Beast** shaders offers four types of tessellation:
{% tabs %}
{% tab title="Fixed" %}
Adds fixed amount of tessellation to the whole mesh. This type of tessellation is useful for meshes with roughly the same size of faces on screen.
{% endtab %}
{% tab title="Distance Based" %}
Models faces tessellation level is calculated based on their distance from the camera.
{% endtab %}
{% tab title="Edge Length" %}
If mesh faces are not roughly the same sizes, then **Fixed** and **Distance Based** tessellation methods create effect when small faces are tessellated too much, while large triangles aren’t tessellated enough. One way to improve this is to compute tessellation levels based on triangle **Edge Length** on the screen.
This makes the shader a bit more expensive, but saves a lot of GPU work for parts of meshes that are outside of the Camera’s view.
{% endtab %}
{% tab title="Phong" %}
[Phong Tessellation](https://www.google.lt/search?q=phong+tessellation) modifies positions of the subdivided faces so that the resulting surface follows the mesh ***normals*** a bit. It’s quite an effective way of making low-poly meshes become more smooth.
{% endtab %}
{% endtabs %}
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