Fesh Script Editor is a dedicated plugin for Rhino that provides an integrated F# development environment for running RhinoCommon code. This utility serves as an embedded scripting environment designed specifically for the Rhino 3D platform. It enables developers and computational designers to write, test, and execute F# code directly within the Rhino interface. By facilitating real-time interaction with the RhinoCommon API, the tool streamlines the development of custom geometry generation, data processing scripts, and automated modelling workflows. Its lightweight architecture ensures minimal overhead, allowing users to leverage the functional programming capabilities of F# to manipulate complex 3D models and automate repetitive tasks without leaving the primary design environment.

The download is a 737 KB file containing .ZIP files.

Once installed within the Rhino environment, the editor opens as a dedicated panel or window, providing a syntax-aware space for writing scripts. Users can execute code snippets directly against the active document, allowing for iterative testing of RhinoCommon methods. The plugin is best utilised for rapid prototyping of generative algorithms where immediate visual feedback in the viewport is required. It integrates seamlessly into existing Rhino workflows, enabling complex geometric operations that would be cumbersome to achieve through manual modelling or standard visual scripting nodes.

The editor is intended for advanced users, computational designers, and software developers working on complex architectural geometry, parametric facades, or structural optimisation tasks. It is particularly effective in high-end design practices where custom logic is required to bridge the gap between initial design concepts and fabrication-ready data. By enabling direct access to the RhinoCommon library, it supports the development of bespoke tools for specific project requirements, from intricate pavilion design to large-scale urban masterplanning and automated BIM data population.