This node creates a mask from the angles of a terrain. The mask created has the same size and resolution as the input terrain.

To add a Mask from angles node, right click in the Graph Editor
and select **Create Node > Mask Generation
> Mask from angles**.

Double click on the node to open its parameters:

Two modes exist to edit the Mask from angles node.

**Gradient mode**: In this mode, a gradient of values exists, where:- 0 corresponds to the defined
**Minimum angle** - 1 corresponds to the defined
**Maximum angle**

At each vertex, the mask has a value of 0 (black color) if the angle of the terrain is less than or equal to the minimum terrain angle; it has a value of 1 (white color) if the terrain angle is higher or equal to the maximum angle; it has a value between 0 and 1 if the terrain angle lies between these two angles.

The Minimum and Maximum angles define the interval to select.

**Horizontal angle**corresponds to the angle horizontal to the terrain from -180 degrees to 180 degrees**Vertical angle**corresponds to the angle vertical to the terrain from -180 degrees to 180 degrees

- 0 corresponds to the defined

**Select**mode: At each vertex, the mask has a value of 1 (white color) if the terrain angle is between the**Maximum**angle and the**Minimum angle**; otherwise, the mask is set to 0 (black color). The range is set manually.

Parameter | Use |
---|---|

Gradient mode | The mask takes a gradient with values between 0 for the minimum angle up to 1 for the maximum angle |

Select mode | The mask is set to 1 for angles between minimum angle and maximum angle; otherwise it is set to 0 |

Maximum angle | The maximum angle in degrees of the terrain |

Minimum angle | The minimum angle in degrees of the terrain |

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