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Photoshop can be extremely intimidating to learn, but once you start to get a grasp on some of the tools it has to offer, you’ll wonder how you ever processed photographs without it. If there’s one area of Photoshop that is both extremely confusing, and yet, extremely powerful when harnessed properly, it’s got to be the collection of blend modes. While this article won’t cover all of the options available within Photoshop, it should give you a good place to start your journey into using Photoshop blend modes.
To simplify the process of trying to learn all 27 blend modes at once below, let’s learn about the three most versatile blend modes Photoshop has to offer.
In all the example photographs below I’ll be using two layers to demonstrate the different effects of each of the three blend modes. The top layer is simply a white, gray, black layer and the bottom layer is the same image placed under those three colors.
This blend mode falls within the “Darken” group and therefore it is considering 100% white a neutral. The basic math behind how this blend mode works is that the dark pixels of the background layer are multiplied with those of the foreground layer and combined. Therefore the result you end up with is an overall darkening of the image, as the dark pixels within both layers become more significant while the light pixels are essentially removed.
As you can see in the 50% gray layer, the darker pixels from the gray foreground layer are helping to darken the layer below it.
This blend mode is great for creating shadows or removing bright pixels from an underlying layer. It can be used in conjunction with a curves adjustment layer to add additional darkness to a layer. By effecting the dark end of the curve this can become really handy when trying to emphasize shadows, or darken an image.
As mentioned above, the lighten group sets black as neutral and therefore when we use the screen blend mode the black layer has no effect, 100% white stays as white and the 50% gray is somewhere in the middle.
In a similar mathematical method to the Multiply blend mode the screen blend mode is multiplying the light pixels of both the foreground and background layers to achieve the final blend. As you can see in the above example, at 50% gray the light pixels are made even lighter as the bright pixels of the gray layer are multiplied with those of the layer below it.
The Screen blend mode is therefore great for removing darkness from an image or can even be used to create soft glow effects around a subject.
Here the formula used by Photoshop is essentially both that of the Multiply and Screen blend modes, then that effect is divided by two. What this means is that you’ll be darkening the dark pixels and lightening the light pixels, and then dividing the end result by two (or 50% of full strength). What ends up happening is an overall increase in contrast of the image
As a result, the Soft Light blend mode, is a great way to add a bit of contrast to an image. For an even stronger effect – use the Overlay blend mode.
One of the best techniques for using this technique is to duplicate your layer and apply the Soft Light blend mode to that layer. You’ll se an instant increase in contrast which can then be fine tuned with the opacity slider of your duplicated layer.
The original image was a bit on the flat side, so by duplicating this layer, and changing it Soft Light blend mode, you’ll notice an increase in contrast. This higher contrast look works well with the rocks, and graffiti wall behind the model.
To take it a step further, a Curves Adjustment Layer was added above the duplicate layer and the blend mode was set to multiply. A layer mask was then applied to this Curves layer to reveal it only over the model’s upper body and face. By applying this small adjustment you’ll notice a bit more definition in the face and shadows.
These three Photoshop Blend modes are just the beginning, but the key to learning a program the size and depth of Photoshop, is to take it in bite sized pieces or you’ll get frustrated and give up quickly. I hope that by focusing your attention to just these three blend modes you’ll be able to digest the program a bit easier.