Thanks go out to Josie Reavely for this tutorial. See Part 1 here!
Step 8: Reactivate the duplicate
Once you’re happy with the direction and shape of your first light, click ok to return to your main image. Reactivate your duplicate layer by clicking the eye icon to the left of it again and make sure this layer is now highlighted so you can begin working on it.
Step 9: Add a second light
Open the Lighting Effects palette once again. This time, choose Omni as the Light type – a circular-shaped light source that’s brighter in the centre than at the periphery, like an ordinary tungsten bulb for example. Change the colour to something that contrasts nicely with the blue we already have in the image.
Step 10: Reposition
Move the omni light source so it emanates from just behind the model’s head, narrowing the focus so it doesn’t spill out over too much of the image. This will act as a second light, adding a contrasting colour to the background. Once you’re happy, click ok,
Step 11: Blend the two
Now we need to combine the two layers to create the two-studio-light effect. To do this, add a layer mask to the duplicate layer, clicking the appropriate icon at the bottom of the Layers palette while ensuring the top (duplicate) layer remains selected.
Step 12: Get Painting
Using a soft brush set at full opacity, carefully begin painting onto the mask in black. You’re aiming to light most of the model in blue, keeping the pink light mainly to the background. Just remember, the pink light is behind the model’s head, and so wouldn’t be illuminating her face – just the periphery around her hair and a little of her cheek – so leave these bits alone for now.
Step 13: Reduce the opacity
With a slighter smaller, soft brush, set the Opacity a little lower – around 50% should do it – and start painting out towards the edges where the pink light is going to touching the model’s skin. Set the Opacity even lower – around 18-20% – and paint up to the edges of the model’s face and body where the pink light would be illuminating them, allowing it mix with the blue.
Step 14: Finish up
With a large brush, just paint over the areas of the background that the blue light should be illuminating (to the left and right of the frame) leaving the pink omni light coming from behind the model’s head untouched. Flatten your image and you’re ready to print or post it online!