Final effect preview:
final effect
The following is the production process:
1. Create a new document with a size of 1280×1024 pixels and a resolution of 300 pixels. Then create a new layer and use the Rectangular Marquee Tool (U) to select the entire image. Now choose Layer Style > Gradient Overlay. (Fill according to the values in the picture below)
Figure 1
Figure 2
2. Now we have got an effect like the picture below. Next we will draw an ocean floor scene on this image.
Figure 3
3. Create a new layer, select the paint bucket tool, and fill it with the color code #003366.
Figure 4
4. Select this layer and go to Filter > Render > Clouds.
Figure 5
5. Set the blending mode in the Layers palette to Color Dodge. The picture below is the effect we got.
Figure 6
Figure 7
6. Then we select the Add Layer Mask button at the bottom of the Layers palette.
Figure 8
7. Select the mask itself, and then use the Gradient Tool (G) to draw a gradient on the layer. The top of the layer will become transparent as shown in the picture below.
Figure 9
Figure 10
8. This step is to find an underwater scene on the Internet, as shown in the picture below:
Figure 11