High-key lighting and Low-key lighting. Two sides of the same dramatic coin. Both take a lot of prep and experimentation at the time of the shoot. Otherwise, it can take a lot of Photoshopping in post. Well, Topaz Adjust 4 can simulate these effects with one click. Both of the above effects were applied to the same original photo.
The High-key Effect by Photoframd expands the highlights while reducing the contrast in the entire image. The Low-key Effect by Photoframd creates rich blacks and shadows while reducing details to a near silhouette. Just use Save Link as… to download these presets (PC Users, Mac Users) and import them into Topaz Adjust 4. Both effects can be further refined by adjusting the sliders within Topaz Adjust. You may also want to mask the subject (after the effect has been applied) and replace the background as needed to complete the desired effect. Enjoy.