This section will be covering the core of the post-production phase. It's important that you have at least a basic understanding of Photoshop in order to get the most out of this section.
I will be giving a brief explanation of the main concepts we will be using as we work on the image.
Now that we have our PSD file, we need to open it into Photoshop (by navigating to File | Open), then take a look at the Layers panel (bottom right of the screen).
As you see, all the outputs we generated are present in the PSD file, converted to layers.
As a short explanation, layers are different and independent elements of the image, in some way acting like sheets stacked one over the other as real acetate layers. We can make the layers act in different ways over the ones at the bottom using blend modes. We can rearrange them by dragging up or down, make them visible or not by enabling/disabling the little eye checkbox besides each of them, and change their opacity by using...