And then there's Perspective Efex, DxO's most recent addition, which offers powerful lens and perspective corrections, tilt-shift effects, and advanced wide-angle distortion correction. You can use the Nik Collection 4 plug-ins with Photoshop, Lightroom, and from within DxO PhotoLab – or use them as external editors with other programs like Capture One.

HDR Efex Pro is pretty handy as an HDR merging/effects tool, and while Sharpener Pro and Dfine feel pretty dated now, they can still be useful for output sharpening and noise reduction respectively. Viveza gets the same treatment and is elevated from a relatively simple local adjustment tool into a much more powerful plug-in. Silver Efex Pro remains the best digital black and white plug-in ever and is updated in this version with a fresh, modern interface, a new ClearView option, and more powerful selective control points. Analog Efex Pro is brilliant at analog/darkroom effects, while Color Efex Pro is a hugely powerful suite of filters for individual use or combined into 'recipes'.

Nik Collection 4 consists of eight separate plug-ins which can also be used as standalone programs.

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