Day 26: Masking using Clipping Path/ Opacity Mask
With Clipping Mask and Opacity Mask, you can quickly mask away any unwanted areas you wish to hide. Let’s take a look how it works…
Clipping Mask
In this illustration I have 3 layers. The background, sunburst effect and the sun. I will need to mask the sunburst to a square.

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First, I will select both the sunburst and background and group it together. Select both with Selection Tool and press Ctrl/Command+G to group it.

Draw a rectangle to decide the area you want to show. Make sure it is at the topmost layer.

Select both the background and the path. Right click and select Make Clipping Mask (Object>Clipping Mask>Make).

Next send the background to the back by pressing Ctrl+Shift+[ / Command+Shift+[.

Editing Clipping Mask
To make any changes to the clipping mask go under the group and select Clipping Path. You can rescale your clipping path in here. To remove the clipping path, go Object>Clipping Mask>Release.

Opacity Mask
Opacity lets your create transparency to your layer. The Intensity of black will determine the opacity of the layer. Black will be transparent and white will be opaque.
Instead of drawing a square in our previous example, I'm now going to draw a circle instead and fill it with gradient.

Now select both shapes and select Make Opacity Mask by clicking the Options icon at the corner of the Transparency Palette.

So now, I have an opacity mask that has the edges fading out. Opacity Mask is a very good way of blending edges to the background and it will prove useful in your illustrations.

Next Lesson: Saving & Printing »
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[/private_basic]
[private_premium]
First, I will select both the sunburst and background and group it together. Select both with Selection Tool and press Ctrl/Command+G to group it.

Draw a rectangle to decide the area you want to show. Make sure it is at the topmost layer.

Select both the background and the path. Right click and select Make Clipping Mask (Object>Clipping Mask>Make).

Next send the background to the back by pressing Ctrl+Shift+[ / Command+Shift+[.

Editing Clipping Mask
To make any changes to the clipping mask go under the group and select Clipping Path. You can rescale your clipping path in here. To remove the clipping path, go Object>Clipping Mask>Release.

Opacity Mask
Opacity lets your create transparency to your layer. The Intensity of black will determine the opacity of the layer. Black will be transparent and white will be opaque.
Instead of drawing a square in our previous example, I'm now going to draw a circle instead and fill it with gradient.

Now select both shapes and select Make Opacity Mask by clicking the Options icon at the corner of the Transparency Palette.

So now, I have an opacity mask that has the edges fading out. Opacity Mask is a very good way of blending edges to the background and it will prove useful in your illustrations.

Next Lesson: Saving & Printing »
Back to Table of Contents
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About The Author: admin
Hi. I'm the founder of Vector Diary. Illustrator is my passion and I have written numerous tutorials on illustrator helping people learn illustrator. My most popular tutorial on learning illustrator in 30 days has been a hit. It makes learning illustrator so easy and has benefited more than 20,000 people worldwide. Also, I've revealed some of my secret techniques in the premium tutorials. So don't forget to check it out!
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