Step 1:

Let’s start out by creating a new file, I used a 1150×860 pixels canvas set at 72dpi with a black background. If you want a larger wallpaper add your own settings. Now on the tools palette set the foreground color to #6E8E00 color shade and set the background to black. Then choose the Gradient Tool, above your screen under the options palette select Linear Gradient and leave the rest of the settings to default.

In a new layer add linear gradient effect on your canvas, drag the linear line from the top right corner of your canvas down to the left corner so the top right corner has a light green and the bottom left has a black shades.

Step 2:

Under Layer Style(Layer > Layer Style) add a Gradient Overlay blending option to your linear gradient design layer.

Result:

Step 3:

Select the Polygonal Lasso Tool, above your screen under the options palette select ‘New Selection and check anti-aliased. Now create a new layer and trace out the line design shown on the picture below. Then fill the selection with black.

Step 4:

Under Layer Style(Layer > Layer Style) add a Gradient Overlay blending option to your black line design layer. Then set the layer’s blending mode to Lighten.

Result:

Step 5:

The line details on the center will be the starting point of the trendy design. Now add a second trendy shape similar to what is shown below. Your shape can be anything as long as it flows with the background and the line details on the center.

Step 6:

Under Layer Style(Layer > Layer Style) add a Gradient Overlay blending option to your black line design layer. Then set the layer’s blending mode to Lighten.

Result:

Step 7:

Once again using your Polygonal Lasso Tool add a selection on the top right corner then fill space with black.

Step 8:

Under Layer Style(Layer > Layer Style) add a Gradient Overlay blending option to your black shape layer from step seven.

Result:

Step 9:

Now add a marquee selection around your canvas(Select > All). Then go to Edit > Copy Merged and back to Edit > Paste. A copy of the current design should appear on your canvas, under Edit > Transform > Scale, resize the width of the copy by dragging the scale points at the right end to the right. Then set the layer’s blending mode to Overlay.

Step 10:

Select your Eraser Tool and set the brush to a large soft brush. Then make the copy design fade with the background by erasing the right end. If you need to erase with a lower opacity level you can modify that above your screen under the options palette.

Step 11:

Now add the same faded design on the top right corner of your wallpaper. You have to rotate this copy through Edit > Transform > Rotate so it’s facing the trendy shape on the middle.

Step 12:

Add a title on the center. You can use font ‘Arial Black’ with a white color shade.

Results:

Green Abstract Wallpaper.