Press on the Alt button and click between the layers, while the Alt button is pressed. This way the mirror-copy will be transformed in a mask of the basic layer.



Set the Soft Light on the layers.



Select the next tool and represent on a new layer (4x4 px) a texture’s cliché, colored in BFCBD9.



Save it!



Create a new layer and apply on it the earlier saved cliché.