Softimage SDK Programmer's Guide > Customizing Softimage using the SDK >

# Custom Fx Operators

Information on how to create and add custom Fx operators to Fx tree in Softimage's integrated compositor.

#### Topics in this section

- What is a Custom Fx Operator?
- Source Code Examples
- UFO Terminology
- Implementation
- Definition
- Raster Inputs and Outputs
- User Data
- Rendering
- Screen Drawing and Screen Interaction
- Memory Allocation
- Compiling Fx Operators
- Installing UFOs