You can add a layer mask to any type of layer or even to a multiple layers gathered in a group. To mask layer in Photoshop you simply have to be on that layer and press the Add Layer Mask button found on the layers tab. As you can see it adds a white layer mask meaning that the entire image is visible.
Accent Wall, Color, Color Consulting, Decorating, long narrow rooms, Paint, painted accent walls, Painting, what is the best wall for an accent wall. I think there are definite times when accent walls are great. I have used a darker wall at the end of a long, narrow room too with wonderful results.
Painting one side of the walls of a room one color, and the other side a different, can also help differentiate between the two. For example, in one space, the left wall can be painted a pale yellow to mark it as the kitchen, whereas the entertainment area can be painted cream or whatever color one wishes.