Photoshop makes it easy to pixelate with the mosaic filter but it’s boring and overused. Thankfully, there’s an easy trick that lets you pixelate using triangles instead of squares! This tutorial is incredibly easy so give it a try.

Final Results

before
New York City Poster

Step 1

Start by opening any photo you want into Photoshop. You should resize the image to your final output size before you continue. This is the photo that we’ll be using.
image

Step 2

Duplicate your background layer twice.
image

Step 3

Activate the Transform tool (Ctrl/Cmd+T or Edit > Free Transform) then set the horizontal skew value to 45º.  The horizontal skew setting is located in the options bar when you have your Transform tool activated. Press Enter to apply the transformation.
image

Step 4

Go to Filter > Pixelate > Mosaic. Adjust the cell size setting to anything you like then click OK.
image

Step 5

Next, we’re going to transform it the opposite way. Activate the Free Transform tool (Ctrl/Cmd+T or Edit > Free Transform) then set the horizontal skew setting to –45º. Press enter to apply the transformation.
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Step 6

Set this layers opacity to 50% then select the middle layer. We’re going to be doing the same steps but with transformations done
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Step 7

With the middle layer selected, activate the Free Transform tool (Ctrl/Cmd+T or Edit > Free Transform) then set the horizontal skew to –45º.
image

Step 8

Apply the same mosaic filter again. You can do this quickly by pressing Ctrl/Cmd+F or by going into the filter menu and selecting the first filter in the menu. Photoshop automatically places your last used filter on the top of this menu.
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Step 9

Use the Free Transform tool (Ctrl/Cmd+T or Edit > Free Transform) to transform the layer back to its original shape by setting the horizontal skew value to 45º.
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Step 10

We’re pretty much done but if you zoom, you can see that the edges don’t really line up. To fix this, press the left or right arrows on your keyboard to nudge the layer until the intersections align.
Before
After
Here’s how the image looks like so far.
image

Final Results

If you’ll be using this as a background, you might want to apply a faded/vintage film effect. We used the Vesper effect from the Instagram Video Photoshop actions and completed the look with some text using the Abolition font.
New York City Poster

Download the PSD

Triangle Pixelation.zip | 2.97 MB
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37 thoughts on “Quick Tip: How to Create a Triangle Pixelation Effect in Photoshop”

  1. I was looking for a perfect mosiac tutorial as I always turn the picture too blurry. This tutorial helped me a lot to understand how it actually works. The tutorial is broken down into several parts which helped me to deeply understand everything. Thanks to you for making such amazing tutorials.

  2. If anyone is any smart, they wouldn’t think this is any good, its cheap JUNK with no texture. It isn’t possible for a “professional” to create these scrubby creations.

    Must be a bunch of kids, looking for something to do besides digging holes.

  3. Really great. I’m going to try this tonight.
    But aside from the tutorial, is there a way you can use that Before/After slide affect on other sites? It’s really great. Awesome presentation.

  4. Nice Thanks For This neat trick
    can you tell me where to get the pic effect to slide from side to side viewing 2 images in the same frame :D
    & Thanks

  5. I’ve applied this technique to all kinds of images since reading this tutorial! I look for certain colors for a look I want, or whatever. Most are really quite a surprise! Good surprise! Never knew this ‘design’ was so easy! Thank you very much!

    Su

  6. thanks dear for giving a new piece of effect in desiging its is easy and effective. i like your tutorial

  7. They look like really wonderful. I have one web page and I want to use this kind of effect for my page pictures. Can somebody look my page for give to me one idea? this is my page. Really I need to take attention from peoples. Please help.

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