Houdini AI Code Nodes

LLM's enhanced nodes to assist your Houdini python or vex workflows.

Vex.Small.Model.Example.mp4

Python.Large.Model.Example.mp4

Features

• Create Code
  • Input the promt and press 'Send Prompt' to generate the required code
• Modify Code
  • Input your request into the 'Modify' tab and press 'Send Modification' to change an existing snippet
• Fix Errors
  • Roll the dice and request for the llm to fix the error on the node

Installation

On the releases page. Download and unzip Houdini.AI.Code.Nodes.zip. Then place the hda's in your otls folder.

The first time you open Houdini after adding the nodes you will see some updates in the console. This is adding the openai python package dependency. When this is done, restart Houdini.

Dependencies

openai python package

This is the standard api for communicating with llms. The openai package should install automatically using pip the first time the nodes are added. You will see some updates in the console, When this is done, restart Houdini.

Troubleshooting

If you need to manually add the python package. Using the correct version of python for your installation of Houdini and run:

pip install openai

Connecting to an LLM

The settings dropdown has the properties for the API key, URL and Model. Update these parameters to work with your preferred service.

After updating the parameters right click the properties and 'Make current value default' so you don't have to do this every time create a new node.

The default parameters are setup to work with LMStudio.

LLM Options

These nodes should work with any llm service, local or remote, that uses the openai api.

Local

LM Studio

LM Studio has a great interface for downloading and using models. To use with the nodes, go to the developer tab, load a model and start the server.

Settings Example: API Key: lm-studio URL: http://localhost:1234/v1 Model: model-identifier

Ollama

Settings Example: API Key: ollama URL: http://localhost:11434/v1/ Model: llama2

Recommended model

• gemma 3 27b

Cloud

Here is a good list of providers

OpenRouter (Free)

OpenRouter is a great service that has free models you can use. The free gemini models are quite good.

Settings Example: API Key: generated-api-key URL: https://openrouter.ai/api/v1/ Model: google/gemini-2.0-flash-lite-preview-02-05:free

Recommended model

• gemma 2.0 flash

Notes

• Larger models create much better results, smaller models can often send code full of errors
• Models work better with python than vex
• It can be very useful to get you started with writing a snippet