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# Custom Filters

A custom filter is a self-installing plug-in that implements a Match callback. The job of the Match callback is to determine whether an object should be filtered out.

#### Topics in this section

- What is a Custom Filter?
- Filter Types
- Filter Callbacks
- Creating a Filter
- Writing 3D Object Filters
- Writing SubComponent Filters
- Writing Property Filters
- Writing Object Filters
- Using Custom Filters in Code
- Registering a Filter