Chimera

Chimera is an agentic generative and digital content creation and CAD hub on ComfyUI, Blender and FreeCAD, with a self-correction loop: every artifact is generated, judged by a vision-language model against a rubric, and re-generated until it passes, across 2D images, 3D meshes and parametric CAD, where an LLM even writes and revises FreeCAD scripts until the render passes.

It runs two ways: as a chimera CLI the user drives directly (editable install from the repo), or through pinned, security-audited MCP bridges that let an AI assistant drive the tools. Image, video, audio, 3D, Blender-render and FreeCAD-CAD all run headless from one core, with no brand and no assistant required. The judge and codegen backend is provider-agnostic (any OpenAI-compatible LLM; unconfigured, it runs local Ollama models sized to the GPU).

The CAD example in the README is a shrouded fan rotor with 18 twisted, lofted blades, built by a FreeCAD script run through chimera cad in script mode. The project is built end to end on an RTX 5090 and written to help anyone on ComfyUI, especially Blackwell (RTX 50-series) cards, and requires ComfyUI 0.40 or newer for the default models.