This is a tutorial for making cartoon doodle illustrations in Adobe Illustrator.

Finally it will be look like this :-)

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I start with my traced sketch that I drew with the Pen Tool and a stroked line.

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I drag my layer from the Layer Palette onto the Create New Layer button. This will create a duplicate layer.

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I want to turn the visibility off on my new layer because I won’t be working on it right now. Click on the little icon that looks like an eye to the left of the layer to make it invisible.

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Now, I select the original layer and use my new plug-in. Go to Select > Object > Open Paths. This will select all the lines that aren’t closed shapes.

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Since I’m going to use this layer as my colored shape layer and the top layer as my line art, I want to delete the all the Open Paths. So, I hit delete on the keyboard.

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Next, I select all. Go to Select > All or use the keyboard shortcut Command/Control A. With everything selected, I put a fill color on the shapes and eliminate the stroke color.

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Now, I turn the visibility back on for my other layer.

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With both layers visible, I want to select all again. After you have selected everything, go to Object > Group. Grouping the objects will pull them all onto the top layer. The reason I want to do this is that some of my shapes need to overlap some of my lines. So, I need everything on one layer to do that.

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Next, I want to add a Brush stroke to all my lines. To do this I’ll need to select all my lines. Yeah, I should have done this before I merged my layers, but I like to do things the hard way. Anyway, select one of your lines, then go to Select > Same > Stroke Color.

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Then, open your Brush Palette and pick the brush you want to use. I used one of the defaults. You may need to adjust the stroke weight after you pick the brush.

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I still need to move my shapes around, so some of my shapes are overlapping the lines. To do this, I select the objects I want to move and use the Object > Arrange > Send to Back.

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Here’s my illustration with everything arranged correctly.

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Next, I want to turn my lines into shapes. To do this, I’m going to use the Flatten Transparency. Select all, and go to Object > Flatten Transparency.

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A dialogue box pops up. Move the slider to 100% vector and click OK.

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Finally, I adjust the colors of my shapes and I’m done.

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Credit: illustrationinfo