Harmony’s rendering engine uses a node-based compositor. Users can create custom FX nodes by combining existing nodes into a Substitution Group and saving it as a .txn template. These behave like built-in nodes.
Example custom FX node:
Limitation: Cannot introduce new algorithmic processing; only rearrange native nodes. Toon Boom Harmony Plugins
For those interested in developing their own plugins, Toon Boom offers extensive documentation and resources. Learning to script in Python or JavaScript is a good starting point, as these are commonly used languages for Harmony plugins. Harmony’s rendering engine uses a node-based compositor
These gaps are often filled by pre-processing (e.g., Illustrator cleanup) or post-render compositing (After Effects, Fusion). For those interested in developing their own plugins,