Use of Opacity Masks- Illustrator Tutorials

Use of Opacity Masks

This tutorial will help you to know the various uses of opacity masks.

Create highlights

Here we are going to create a shape having highlights using an opacity mask.

What is an opacity mask?

Opacity mask is used to mask off an area of an object and selectively allow visibility to whatever is underneath. Opacity is the measure of see-through an object is. The more opaque the object is the less see-through it will have. So, adding a mask means you are only allowing some light to pass through. It can be used to create a realistic light effect. It is said that light defines the shape of an object by reflecting off it. You can use the opacity mask in illustrator to create such an effect.

 Starting from a base shape

Let us start with a base shape. Here I have used a circle having a simple gradient and stroke.


Use of Opacity Masks


Now we need to create a highlight. You can either use the pathfinder panel or the pen tool to create this effect.


Use of Opacity Masks


Create a new layer. Copy the highlighted shape. Fill it with a black and white gradient. Apply the Opacity Mask. Now you can see through the white portion but the black portion will be masked. Here, the light source is coming from the top left.


Use of Opacity Masks



Making the opacity mask

Creating the opacity mask

Select the highlight and the gradient layers. Go to the Transparency Panel (Window > Transparency). In the right-hand corner at the top there is a flyout menu. From it choose Create Opacity Mask.


Use of Opacity Masks


That’s it. This is a way you can create light effects in illustrator.


Use of Opacity Masks



Final Image


Use of Opacity Masks


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