How to create realistic smoke effects.

1. Open your image in Photoshop. Create a new layer above the image layer.

2. Set your foreground color to black and your background color to white. (You can do this by simply hitting the d key on the keyboard.) Now, hold down the option/alt key and choose Filter - Render - Clouds from the menu.Holding down the option/alt key forces the clouds filter to have more contrast.Your clouds may look a little different but they should cover the entire image layer. Your image should look like this(don’t be scared):

3. From the layers palette click and hold the “Add new style” and choose “Blending Options” from the popup menu.