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  "path": "/t/testing-gpt-5-5-via-api-inside-houdini-3d-understanding-procedural-reasoning-and-simulation-workflows/1380787#post_1",
  "publishedAt": "2026-05-13T10:48:04.000Z",
  "site": "https://community.openai.com",
  "textContent": "Hi everyone,\n\nI’m currently exploring **GPT-5.5 via the API inside SideFX Houdini** , focused on procedural 3D workflows, node-based generation, Houdini Digital Assets (HDA), and now simulation setups.\n\nWhat surprised me most is how well the model can reason about 3D structure when it receives the right production context. Houdini is not just about generating a final shape. It requires understanding hierarchy, spatial relationships, attributes, constraints, parameters, variation systems, and how different operations should work together inside a procedural graph.\n\nIn my experience so far, GPT-5.5 shows very strong procedural reasoning. It can break a 3D idea into logical construction steps, help plan editable node networks, suggest artist-facing controls, and organize the result into a clean Houdini workflow.\n\n_I attached a example I use in the demo to show the workflow_\n\n  * _a procedural asteroid-style generator with layered displacement and scatter/detail logic_\n\nThe important part for me is that these are not just static AI images.\nThey are procedural Houdini setups: editable node networks, geometry, controls, and systems that can be inspected and modified by an artist.\n\n\n\n\nI’m also starting to test how far this can go with simulations, where the model needs to reason about sources, solvers, forces, constraints, caching, and artistic controls.\n\n> For anyone not familiar with Houdini: a node network is like a visual recipe for building 3D content. Each node performs an operation, such as creating geometry, scattering points, adding noise, simulating particles, or modifying attributes. A Houdini Digital Asset is a reusable tool built from that network, with clean controls exposed to the artist. So the goal is not only to generate something that looks correct once, but to generate a system that remains editable, reusable, and understandable.\n\nI’m curious if anyone else is experimenting with OpenAI models inside complex 3D, simulation, node-based, or visual programming environments.",
  "title": "Testing GPT-5.5 via API inside Houdini: 3D understanding, procedural reasoning, and simulation workflows"
}