When a node is selected, if its computation is associated with a terrain or a mask, the terrain or mask is displayed in the Viewport. In the example below, clicking on the Alpha blend node shows the computation of the Perlin noise and Slope terrain generators.
To add a node(s) to the selected nodes, press Ctrl and click the node to add.
To delete a node(s) from the selected nodes, press Ctrl and click the node to delete.
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