In the world of design, it’s all about being innovative and creative. To convey your innovative and creative ideas to a client, translate them into something they can see, you may need to create a visualization, a mockup. Photoshop remains the standout choice for this kind of exercise, offering as it does a dazzling range of tools for creating and manipulating images. In fact, Photoshop is such an elaborate piece of software that it can be difficult to work out exactly how to achieve a particular effect.
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DesignFestival: Photoshop Techniques, Tips and Tricks