Creating a triangle pattern in Adobe Illustrator is an easy process, which we explain in full in our Illustrator training courses.
The steps involve setting up a repeat grid, then using the Pathfinder functions and adding colours. Then could we convert the shapes into a repeat pattern for later use.
First create a new document of size 100 x 100 mm and a Colour mode of RGB. Next go to Edit > Preferences. Or Illustrator > Preferences if you’re using the Mac version of the program.
In the Guides & Grid section change Gridline Every to 10mm, and hit OK. Then View > Show Grid. So that we draw precisely we also choose Snap to Grid.
Choose the Line tool and create a horizontal line across the top of the page. Copy this line down to the next grid line by selecting it, pressing Alt (Mac: Option) and moving it down to the next grid line. Next press Control+D to repeat down the page several times, in other words Step and Repeat.
Repeat this process to create the vertical lines across the page. And repeat again for a set of 45 degree lines.
To convert these lines into editable shapes select all and go to Window > Pathfinder and choose the Divide option. Select all and change the colours to a yellow fill with no stroke, for example. Now we simply select individual triangles and fill them with other colours.
We could also select the pattern and go to Object > Pattern > Make to create an actual pattern swatch for future use.
Whether you’re a complete beginner or self-taught, our courses will help you gain self-confidence in your Illustrator workflow, as well as adding to your professional skill-set. See many examples of our Illustrator clients’ work on our Facebook page.
Other related Illustrator Blog Posts:
Illustrator workspace
Illustrator basics
Illustrator clipping masks
Illustrator live trace
Illustrator brushes