Adding a Mask from angles node

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:

Editing a Mask from angles node

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
  • 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.

Parameters

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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