---
title: mask-shape
framework: professional-video-applications
role: article
path: professional-video-applications/mask-shape
---

# mask-shape

## mask-shape

mask-shape Describes a shape that serves as a mask.

Overview

Define a shape mask in terms of a few parameters and describe these parameters using a `param` element. You can add animation to the shape by applying key frame animation to the parameters.

The attribute below controls the characteristics of the mask.

| Attribute | Description | | --- | --- | | `blendMode` | Specifies how to combine the shape mask with other masks for a masked filter.  [IMAGE]: spacer The valid values are: `add`, `subtract`, or `multiply`. Default is `add`. | | `tracking` | References a tracking shape associated with this shape mask. |