How to Easily Make a Cell Pattern in Illustrator
There are times when you'll need to use a pattern to fill areas of your design to make them more appealing. Most of the time the just-right pattern is hard to find or it does not even exist. Fortunately, making a pattern in Illustrator is quick and easy. Today I will show you how you can make a cell pattern in less than 5 minutes by using only the default Illustrator tools.
Open Illustrator and make a new file at any size you want. In this case, I will make mine 800 x 800 px.
Select the Ellipse Tool (L) and click once over the artboard. Set the Width and Height to 100 px and click OK.
Go to Edit > Copy and then to Edit > Paste in Front.
While holding the Shift key on your keyboard, drag the copied circle to the right until it is aligned with the end of the original one, as shown.
Again, copy, paste and drag the copied circle to the right until it is aligned with the end of the second circle as shown.
Select the 3 circles, copy, paste and drag the copied circles down until they are aligned with the end of the first circles row as shown.
Again, copy, paste and drag the copied circles down until they are aligned with the end of the second circles row as shown.
Select All circles and go to Window > Stroke. Set the stroke Weight to 10 pt.
With all circles selected, go to Object > Expand. Check both Fill and Stroke and click OK in the expand window.
Pick the Shape Builder Tool (Shift+M) and then drag a line across the bottom right circle to the middle one as shown.
Now drag a line across the middle left circle to the middle top one as shown.
Using the Selection Tool (V) select both shapes and go to Object > Pattern > Make. Apply the following settings and then click "Done" in the top toolbar.
Delete all elements in the artboard and using the Rectangle Tool (M) make a rectangle covering the whole canvas area.
Lastly, with the rectangle selected go to Window > Swatches. Be sure to have the Fill selected and click once over the new pattern.