On this video tutorial Aaron Nace from Phlearn demonstrates how to add a realistic looking reflection of a city to a model’s sunglasses using Photoshop.
This tutorial brings together quite a few things including selections and advanced masking. We start by lowering the opacity of the second image (the one used for the reflection) and duplicate a part of it – one for each eye. Next we create a group and put the layer mask on the group – which will make your “reflected images” only visible on the glasses (pretty cool actually).
From now on our goal is to make the reflection look realistic by adding an adjustment layer (levels) and changing the color by adding another adjustment layer (hue and saturation).
Only recently Nace looked at the other side of what you can do with glasses – i.e. removing reflections and glare off them.