: Illustrator: how to fill shapes with a 45 degree line pattern? Any way to fill these shapes with a pattern somehow, and avoid that duplicated line system which looks like a total mess in the

@Barnes313

You can create a Pattern Swatch and use that pattern as a fill. I would start with what you have already, with two specific notes:


Make a perfect square as your background.
Space the diagonal lines so that they divide the square evenly. (I used a 2 inch square and 1/4 inch spaced lines)






Then create a clipping mask the same size as your background



At this point you can drag the whole clipping group into the Swatches Panel.



When you assign this swatch as a fill to your desired object, double-click on the swatch to edit the options. Select the "Size Tile to Art" option and you're done.

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@Nimeshi706

Use a pattern...

There are a bunch of line patterns loaded with Illustrator by default (Open Swatch Library → Patterns → Basic Graphics → Basic Graphics Lines).

You can use them as a second fill using the appearance panel and use blending etc to get the effect you want. You can add a Transform effect to that specific fill (make sure to check "Transform Patterns") to get the rotation & scale you want:



...and the same with a different blending mode:



If the default line patterns don't work for you then you can of course make your own pattern; which should be as easy as creating a small section of the lines you want (you could do it with a single line if you really wanted to) and dragging them to the Swatches panel, then double clicking to enter the pattern editor:



Read more here:


How to create and edit patterns in Illustrator – Adobe Support

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