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# Custom ICENodes

Custom ICENodes are regular ICENodes implemented as self-installable plug-ins with the C++ API. Like built-in ICENodes, a custom ICENode reads in data, processes it and then writes out the data.

#### Topics in this section

- What is a Custom ICENode?
- Processing phases
- Implementation Overview
- Registering a Custom ICENode
- Custom ICENode Processing
- Custom ICENode Categories
- Applying Custom ICENodes
- Custom ICENode Wizard
- Limitations