If you have to smoke photos then the most important thing is background light. For this, a dark background will be needed. This will only require a flash, so you do not want much stuff. The best would be to use incense sticks for you. If you are using candles then keep the camera in a burst mode.
What to do-
Put the black background behind the object for the smoke photography. With this, any color can be given to Smoke in Photoshop and it will be easy for you too. Now just grab the photo from the camera.
Use the Ctrl + i in Photoshop to give the final touch and if you want to change the color, then use the Gradient tool.
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