I'd like to recreate the effect used in this picture. How can I do this in Photoshop?
closed as off topic by ElendilTheTall, Itai, dpollitt, John Cavan♦, jrista♦ Jan 6 '12 at 4:39
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Photograph the smoke with a black backround. Light the smoke from the side to keep the background dark and boost the constrast of the smoke against that background.
In photoshop, invert the image so the background is now white.
Use a Hue/Saturation layer, check the Colorize box, and use the hue slider to pick the color you want for the smoke (the background will remain white).