Now that we have the tint in place, let's add some noise to make the two photos look more unified (plus it gives a bit of that grainy film look). We can't add the noise to the adjustment layer so we need to create a new blank layer at the top of the layer's stack; however, Photoshop won't let you apply the Noise filter to a blank layer, so we use this workaround.
- Click on the right-facing arrow at the top of the Layers palette and in the pop-up menu.
- Choose New Layer to bring up the New Layer dialog.
- Change the blend Mode from Normal to Overlay, which brings up a new option below the blend Mode pop-up menu.
- Turn on the checkbox for Fill with Overlay-Neutral Color (50% Gray) and click OK. This creates a new blank layer in Overlay mode that's filled with 50% gray, and although the layer's thumbnail looks gray, it appears completely transparent, in your image because it's in Overlay mode.
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