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

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

Double click on the node to open its parameters:

Two modes exist to edit the Mask from slopes node.

**Gradient mode**: In this mode, a gradient of values exists, with 0 corresponding to the defined**Minimum slope angle**and 1 corresponding to the defined**Maximum slope angle**.

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

**Select**mode: At each vertex, the mask has a value of 1 (white color) if the slope of the terrain is between the**Maximum**slope angle and the**Minimum slope 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 slope angle up to 1 for the maximum slope angle |

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

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

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

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