INVERT SELECTION

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The Invert Selection node will create a new selection (area) that is the inverse of a given selection (area). For instance, if you have created a sky selection and you invert it using this node, you can then apply changes to the ground without needing users to create a ground selection themselves. You might want to use this approach if you have replaced a grey sky with one that is sunny since you can then use other nodes to 'warm' the ground's colors. This will match it to the new sky.