Now we’re going to create the diagonal bar brush. Create a new layer (Layer > New Layer or Ctrl/Command+Shift+N). This layer should be positioned as the top layer. Note that this is only a temporary layer for us to create the brush and will be deleted later.
Select the Rectangular Marquee tool then create a selection roughly the same size as the image below.
Fill the selected area with black. You can do this by going to Edit > Fill, set the contents to Black, then click OK.
Go to Edit > Transform > Skew. Drag the top middle input slider the right so that it is skewed like shown in the image below. Don’t deactivate the selection yet.
Now go to Edit > Transform > Rotate. Move your cursor outside the bounding box then drag to rotate. If you hold the Shift key while rotating, it’ll snap the rotation to 15° increments. Rotate like shown in the image below then press Enter on your keyboard to apply the changes.
Go to Edit > Define Brush. You can name it anything you like. I’m going to name it “Diagonal Bar”. Click OK then deactivate the current selection by going to Select > Deselect or pressing Ctrl/Command+D.
Delete the current layer by going to Layer > Delete > Layer.
Create a new layer (Layer > New Layer or Ctrl/Command+Shift+N) and position it below the layer with the girl. Rename this layer to “Diagonal Bars”.
Select the Brush tool then select the Diagonal Bar brush that we just made. You can change the brush by right-clicking anywhere in the document window.
Go to Window > Brushes to bring up the Brushes palette. Checkmark the Shape Dynamics option then set the Size Jitter to 100%.
Checkmark the Scattering option then set the Scatter to 100%.
Make sure your foreground color is black. You can reset your foreground and background colors by pressing D on your keyboard. With the Brush tool selected, paint on the current layer so that you get something like this.
Here’s what the Layers Palette looks like.
Go to Layer > Layer Style > Gradient Overlay. Load the Spectrums set of gradients.
Select the Spectrum gradient. Set the angle to –45° and scale to 150%. Don’t click OK yet.
In the document window, adjust the gradient position by dragging it towards the bottom right until you get a blue/pink gradient like shown in the image below.
Now we’ll create the 3D diagonal bars. This is where you need Photoshop Extended to use the 3D tools. Create a new layer (Layer > New Layer or Ctrl/Command+Shift+N) and position it as the top layer. Rename this layer to “3D Diagonal Bars”.
Set your foreground color to white. Select the Brush tool then paint some diagonal bars using the diagonal bar brush just like what you did earlier. Don’t make it too big because or else it may be too complicated for Photoshop to process. If it’s too complicated, Photoshop will let you know when you try to convert it to a 3D layer.
Hold down the Ctrl/Command key on your keyboard then click on the thumbnail of the 3D Diagonal Bars layer. This will create a selection of the layer.
You can create a 3D object out of a selection, but the edges will be jagged. To get the sharp edges, we’ll create a vector path. In the Paths palette (Window > Paths), click on the Make work path from selection button. This will create a vector path using the selection.
You’ll now have a new vector path of the selection.