photoshop_create_layer_mask

Create a layer mask on the active layer from the current selection (reveal selection). Users often say: mask this, hide the background, non-destructive cutout (after selection). Use when: non-destructive hide/show after a selection exists. Do NOT use when: no selection exists — create selection first or use remove_background recipe. Returns: maskCreated confirmation. Preconditions: active document and active selection. Side effects: adds mask to active layer.