Masking With a Layer Mask
Photoshop CS3 Tutorial
How to Create and Edit a Layer Mask in Photoshop
Masking involves removing unwanted areas of your image. You are often left with just one person or one object.
A new layer can then be added below the masked image and your person or object is transported to a new reality.
Open an image in Photoshop (File > Open).
With the image layer selected, double-click the layer thumbnail. Click OK and the layer is no longer a Background layer.
With the image layer still selected, choose Layer > Layer Mask > Reveal All.
A new white layer mask is added to the image layer. Click the Mask icon to select the mask.
Select the Brush tool and set the foreground color to black (press the d key, then press the x key).
Zoom in on the image and using a three pixel hard-edged, 100% opacity brush, paint the mask with black. Paint with white if you need to restore the image.
Paint around the object and the background appears. For clarity, add a new layer below the image layer filled with a bright color. Continue the painting process with a larger brush to finish the mask.