Creating a Wallpaper in Illustrator using Gradients, the Blend tool and Blending modes.
First we will start by getting the document set up with standard computer screen resolutions. Create a New document with the following settings. Making sure you change the Units to Pixels, and the Color Mode to RGG Color.
Next Rename Layer 1 to Background by double clicking on it in the Layers Window (Window/Layers) and renaming it in the window that pops up.
Select a Fill Color and set the Stroke Color to None and create a Rectangle the exact size of what we need my selecting the Rectangle Tool and then clicking on the ArtBoard and putting in the exact pixels. Then move it so its within your ArtBoard.
Go to the Background Layer and expand it by clicking on the triangle icon and lock the blue rectanble shape by clicking on the box next to the eye. This will make it so that we don’t accidentally select it.
Next we will use simple shapes, a line, and the blend tool to create an interesting design to fill your canvas.
Create two circles fairly far apart. Fill them with whatever color you choose.
Next deselect everything by clicking on any white part of the workspace. Then select the blend tool., or press W on your keyboard.
With the Blend Tool selected Click on one of the circles then click on the other other circle. After clicking on the second circle you will see that the bled tool creates in between shapes. You will also see a line create in between the shapes.
With the new shape created select the Add Anchor Point Pen Tool. Click and hold on the Pen Tool to see the different options and select the Add Anchor Point Pen Tool
Go to the line between the circles and add an Anchor Point by just clicking on the line
Then using the Direct Select Tool and select the new Anchor Point you created and drag it to a spot you prefer. Create more Anchor Points if you would like.
Next select the Convert Anchor Point Tool by holding down on the Pen Tool Icon
With the Convert Anchor Point Tool selected click and drag on the Anchor Point you created.
As you can see this is sort of a bad layout of the spheres to remedy this, use the Add Anchor Point tool and add anchor points to either side of the middle anchor point. I highlighted green the anchor points.
Next we will used one of Illustrator Standard Graphic Styles to fill in the Circles. With the Direct Select Tool Select one of the circles then go to Window/Graphic Styles and select Clear Bubble. You will see the new graphic style completely replace your first circle and then blend to whatever color/style you had when you first created the circles.
The Bubble are starting to look pretty good, but the color seems to stand out a bit too much. With the bubbles selected go to Window/Transparency, Here you can set the Opacity of them, or you can set the Blending Mode of the Bubbles with the background. Its default should be Normal, Set it to Overlay. Make sure you have the Bubbles selected and it should look something like the image below. Feel Free to explore the different Blending Options and choose one you like best.
If you want all the circles to have the same Bubble Style, use the Direct Select tool and select the circle at the opposite end and apply the same Bubble Graphic Style
To make your background a bit more interesting, Unlock your Background Layer and apply a gradient to your liking. When you have your gradient set to your liking, Lock the Background Layer again.
Next create a Shape using the Pen Tool. We will fill this shape with a Gradient and adjust its Blending Style so that it fits nicely into the composition. After creating the Shape, in the Layer Window, move it on top of the Background Path
Next add a gradient fill to the Shape, then using the Gradient Tool, click and drag on the screen in the direction you want the gradient to follow.
Once you have the gradient the way you want it to be adjust the colors to your liking.
Next play with the Blending Options Under the Transparency Window until you find one to your liking.