With the permission of the author of this tutorial, we bring you the entire procedure, plus images of appropriate screens. Try to do every step bellow and create your own rainbows:))

Rainbow Lines Tutorial

Rainbow Lines Tutorial

1. Open a new document eg 1024 × 768 px, fill it with black.
2. Create a new layer (above the previous) and fill it with white color
3. Select Filters >> Render >> Fibers and apply the following settings

Fibers

4. Select Filter >> Blur >> Motion Blur and apply the following settings

Motion Blur

5. Apply a Gradient Overlay with the following settings, set the overlay as you see it below

Gradient Overlay

6. Now group the layer to a new automatic object, this duplicate, overlap, set a new layer, select Filter >> Other >> High Pass and set the radius of 10px

High Pass

6. Black background layer to hide, and press (Shift + Ctrl + E) to connect visible (Ctrl + T) to adjust the size of linked layers

Adjust the size

7. Modified layer rotate 45 degrees and drag it into the corners of the canvas

Rotate

8. Select Picture >> Customization >> levels, set as shown.

Levels

9. Final, apply more ideas, add text.

Rainbow Lines Tutorial

Source:
Giackop Design / Giacomo Coppola » Blog Archive » Lines Tutorial

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David

Graphic and website designer, currently, I attend to the maintenance of about thirty sites for existing clients as well as creating websites for the new ones. In my free time, I get into the secrets of the world of Linux, SSH, WP-CLI and I’m preparing this blog.

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