The colour adjustments we’ve looked at here have largely been aimed at correcting or enhancing colours. But many of the techniques can be adapted to produce more extreme colour alterations. Using Photoshop, it’s possible to mimic many of the effects once generated in darkrooms, including solarisation, sepia-toning, cross-processing and more. Indeed, with a little experimentation, it’s possible to come up with effects never seen before – and sometimes effects you’ll never want to see again… Apart from the ideas we introduce here, you can try out Photoshop’s different layer blending modes, either blending two images together, or duplicating the current image layer then changing the way it interacts with the layer below. Don’t just stop with a single modification or filter, but try combining them. There are so many permutations in Photoshop that you may never exhaust them all.