How to create random noise in Photoshop tutorial

A quick guide to creating random noise in Photoshop CC 2018 2017 2015 CS6 etc using different small source designs - create unique grains for your work in seconds

Create random noise in Photoshop

how to create random noise / grain / pixels in Photoshop tutorial
  1. New document (10 pixels x 10 pixels say)

  2. Ellipse tool in Photoshop toolbar for the random noise pattern source (or rectangle or small star etc)

  3. Set color to red (or any other color for the random noise though best to avoid black as there will be no randomization in the script)

  4. Set option to shape layer

  5. Create small shape (though this could as easily be a small image etc)

  6. Delete background via layers panel and remove

  7. Edit menu and Define pattern

  8. New document such as 1000 x 1000

  9. Edit menu

  10. Fill (custom pattern, script ON and 'random fill')

  11. Select the small previously created pattern in Photoshop

  12. OK

  13. Set the density to a high, scale to 1 etc

  14. Set brightness and saturation settings as required though it works best if you set these to a high value

  15. OK

  16. You can also then apply blurs and other effects such as oil paint or camera raw etc

videoVideo tutorial on the subject by (youtube)


Using different shapes or images etc : imageYou now a have a quick grain effect using the scripting feature of PS. The above uses a small shape such as a circle or rectangle but you could just as easily used a very small image as the source pattern. Or perhaps use a small gradient as a source design.


You can also use an image and set the size of the document to something like 5 x 5 pixels or 10 x 10. Use the image menu and image size command. You can then define that via the edit menu and use the fill command to create the grain


You can apply the fill multiple times to build a more complex design. You can also combine it with other effects such as blurs


Thin line : thinYou can quickly create an unique thin line grain by creating a document and then applying a very small and thin rectangle (3 pixels x 20 pixels say) by using the rectangle tool. If you use the shape option then you can delete the background layer and then capture the tile via the edit menu and define command (use the rectangular marquee tool for the tile).


You can then use the fill command with the script and using that tile. Use very small maximum and minimum size. You can then click OK. You can repeat once or multiple times to build a very complex thin line grain for use in your projects.


You can combine the grain with blur effects or oil paint etc


Repeat applies : repeatAlternatively, you could use some of the plugins that are supplied with the application such as the filter gallery and the artistic / film grain as well as many other filter tools. They are great to use but the above approach does mean you can use anything as a source for the background or overlay and the grains are then totally unique to your projects and they can be re-applied again and again with different outcomes. You could also use them in combination with the filters perhaps combined with actions in PS


Scripting tiles : panelThe random scripting feature was only introduced in fairly recent versions of PS so if you have CS5 CS4 etc then you will have to use the filters approach or perhaps use scripting instead (you probably can find a number of scripts for this on the web or perhaps develop your own JavaScript random function routines)


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